diff --git a/src/index.js b/src/index.js
index 990aab25..2db9148a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,24 +1,30 @@
 
-export { Y } from './utils/Y.js'
-// export { UndoManager } from './utils/UndoManager.js'
-export { Transaction } from './utils/Transaction.js'
-export { ItemJSON } from './structs/ItemJSON.js'
-export { ItemString } from './structs/ItemString.js'
-export { ItemFormat } from './structs/ItemFormat.js'
-export { ItemEmbed } from './structs/ItemEmbed.js'
-export { ItemBinary } from './structs/ItemBinary.js'
-export { GC } from './structs/GC.js'
-
-export { YArray as Array } from './types/YArray.js'
-export { YMap as Map } from './types/YMap.js'
-export { YText as Text } from './types/YText.js'
-export { YXmlText as XmlText } from './types/YXmlText.js'
-export { YXmlHook as XmlHook } from './types/YXmlHook.js'
-export { YXmlElement as XmlElement, YXmlFragment as XmlFragment } from './types/YXmlElement.js'
-
-export { createRelativePosition, createRelativePositionByOffset, createAbsolutePosition, compareRelativePositions, writeRelativePosition, readRelativePosition, AbsolutePosition, RelativePosition } from './utils/relativePosition.js'
-export { ID, createID, compareIDs } from './utils/ID.js'
-export { isParentOf } from './utils/isParentOf.js'
-
-export { writeStructs, writeStructsFromTransaction, readStructs } from './utils/structEncoding.js'
-export { getState, getStates, readStatesAsMap, writeStates } from './utils/StructStore.js'
+export {
+  Y,
+  Transaction,
+  YArray as Array,
+  YMap as Map,
+  YText as Text,
+  YXmlText as XmlText,
+  YXmlHook as XmlHook,
+  YXmlElement as XmlElement,
+  YXmlFragment as XmlFragment,
+  createRelativePosition,
+  createRelativePositionByOffset,
+  createAbsolutePosition,
+  compareRelativePositions,
+  writeRelativePosition,
+  readRelativePosition,
+  AbsolutePosition,
+  RelativePosition,
+  ID,
+  createID,
+  compareIDs,
+  writeStructs,
+  writeStructsFromTransaction,
+  readStructs,
+  getState,
+  getStates,
+  readStatesAsMap,
+  writeStates
+} from './internals.js'
diff --git a/src/internals.js b/src/internals.js
new file mode 100644
index 00000000..dea4946c
--- /dev/null
+++ b/src/internals.js
@@ -0,0 +1,33 @@
+export * from './utils/DeleteSet.js'
+export * from './utils/EventHandler.js'
+export * from './utils/ID.js'
+export * from './utils/isParentOf.js'
+export * from './utils/relativePosition.js'
+export * from './utils/Snapshot.js'
+export * from './utils/StructStore.js'
+export * from './utils/Transaction.js'
+// export * from './utils/UndoManager.js'
+export * from './utils/Y.js'
+export * from './utils/YEvent.js'
+
+export * from './types/AbstractType.js'
+export * from './types/YArray.js'
+export * from './types/YMap.js'
+export * from './types/YText.js'
+export * from './types/YXmlElement.js'
+export * from './types/YXmlEvent.js'
+export * from './types/YXmlHook.js'
+export * from './types/YXmlText.js'
+
+export * from './structs/AbstractStruct.js'
+export * from './structs/AbstractItem.js'
+export * from './structs/GC.js'
+export * from './structs/ItemBinary.js'
+export * from './structs/ItemDeleted.js'
+export * from './structs/ItemEmbed.js'
+export * from './structs/ItemFormat.js'
+export * from './structs/ItemJSON.js'
+export * from './structs/ItemString.js'
+export * from './structs/ItemType.js'
+
+export * from './utils/structEncoding.js'
diff --git a/src/structs/AbstractItem.js b/src/structs/AbstractItem.js
index 7b0ad76a..ac920482 100644
--- a/src/structs/AbstractItem.js
+++ b/src/structs/AbstractItem.js
@@ -1,23 +1,25 @@
-/**
- * @module structs
- */
 
-import { readID, createID, writeID, ID } from '../utils/ID.js' // eslint-disable-line
-import { GC } from './GC.js'
+import {
+  readID,
+  createID,
+  writeID,
+  GC,
+  nextID,
+  AbstractRef,
+  AbstractStruct,
+  replaceStruct,
+  addStruct,
+  addToDeleteSet,
+  ItemDeleted,
+  ID, AbstractType, Y, Transaction // eslint-disable-line
+} from '../internals.js'
+
+import * as error from 'lib0/error.js'
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
-import { ItemType } from './ItemType.js' // eslint-disable-line
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
-import { Y } from '../utils/Y.js' // eslint-disable-line
-import { Transaction, nextID } from '../utils/Transaction.js' // eslint-disable-line
 import * as maplib from 'lib0/map.js'
 import * as set from 'lib0/set.js'
 import * as binary from 'lib0/binary.js'
-import { AbstractRef, AbstractStruct } from './AbstractStruct.js' // eslint-disable-line
-import * as error from 'lib0/error.js'
-import { replaceStruct, addStruct } from '../utils/StructStore.js'
-import { addToDeleteSet } from '../utils/DeleteSet.js'
-import { ItemDeleted } from './ItemDeleted.js'
 
 /**
  * Split leftItem into two items
diff --git a/src/structs/AbstractStruct.js b/src/structs/AbstractStruct.js
index c214d30a..860b92f7 100644
--- a/src/structs/AbstractStruct.js
+++ b/src/structs/AbstractStruct.js
@@ -1,6 +1,8 @@
-import { Y } from '../utils/Y.js' // eslint-disable-line
-import { ID, createID } from '../utils/ID.js' // eslint-disable-line
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
+
+import {
+  Y, ID, Transaction // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js' // eslint-disable-line
 import * as error from 'lib0/error.js'
 
diff --git a/src/structs/GC.js b/src/structs/GC.js
index 25ce963b..06d42be5 100644
--- a/src/structs/GC.js
+++ b/src/structs/GC.js
@@ -1,9 +1,14 @@
 /**
  * @module structs
  */
-import { AbstractRef, AbstractStruct } from './AbstractStruct.js'
-import { ID, readID, createID, writeID } from '../utils/ID.js' // eslint-disable-line
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
+import {
+  AbstractRef,
+  AbstractStruct,
+  createID,
+  writeID,
+  ID // eslint-disable-line
+} from '../internals.js'
+
 import * as decoding from 'lib0/decoding.js'
 import * as encoding from 'lib0/encoding.js'
 
diff --git a/src/structs/ItemBinary.js b/src/structs/ItemBinary.js
index b08c55b7..370b88f1 100644
--- a/src/structs/ItemBinary.js
+++ b/src/structs/ItemBinary.js
@@ -4,14 +4,17 @@
 
 // TODO: ItemBinary should be able to merge with right (similar to other items). Or the other items (ItemJSON) should not be able to merge - extra byte + consistency
 
-import { AbstractItem, AbstractItemRef } from './AbstractItem.js'
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
+import {
+  AbstractItem,
+  AbstractItemRef,
+  getItemCleanEnd,
+  getItemCleanStart,
+  getItemType,
+  Transaction, ID, AbstractType // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
-import { ID } from '../utils/ID.js' // eslint-disable-line
-import { Y } from '../utils/Y.js' // eslint-disable-line
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
-import { getItemCleanEnd, getItemCleanStart, getItemType } from '../utils/StructStore.js'
 
 export const structBinaryRefNumber = 1
 
diff --git a/src/structs/ItemDeleted.js b/src/structs/ItemDeleted.js
index 0211aecb..0c4a93a2 100644
--- a/src/structs/ItemDeleted.js
+++ b/src/structs/ItemDeleted.js
@@ -4,13 +4,17 @@
 
 // TODO: ItemBinary should be able to merge with right (similar to other items). Or the other items (ItemJSON) should not be able to merge - extra byte + consistency
 
-import { AbstractItem, AbstractItemRef } from './AbstractItem.js'
+import {
+  AbstractItem,
+  AbstractItemRef,
+  getItemCleanEnd,
+  getItemCleanStart,
+  getItemType,
+  Transaction, ID, AbstractType // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
-import { ID } from '../utils/ID.js' // eslint-disable-line
-import { getItemCleanEnd, getItemCleanStart, getItemType } from '../utils/StructStore.js'
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
 
 export const structDeletedRefNumber = 2
 
diff --git a/src/structs/ItemEmbed.js b/src/structs/ItemEmbed.js
index 559abee0..27c47dd2 100644
--- a/src/structs/ItemEmbed.js
+++ b/src/structs/ItemEmbed.js
@@ -2,15 +2,17 @@
  * @module structs
  */
 
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
-import { AbstractItem, AbstractItemRef } from './AbstractItem.js'
-import { ItemType } from './ItemType.js' // eslint-disable-line
+import {
+  AbstractItem,
+  AbstractItemRef,
+  getItemCleanEnd,
+  getItemCleanStart,
+  getItemType,
+  Transaction, ID, AbstractType // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
-import { Y } from '../utils/Y.js'  // eslint-disable-line
-import { ID } from '../utils/ID.js' // eslint-disable-line
-import { getItemCleanEnd, getItemCleanStart, getItemType } from '../utils/StructStore.js'
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
 
 export const structEmbedRefNumber = 3
 
diff --git a/src/structs/ItemFormat.js b/src/structs/ItemFormat.js
index 943c27c5..8747146c 100644
--- a/src/structs/ItemFormat.js
+++ b/src/structs/ItemFormat.js
@@ -2,15 +2,17 @@
  * @module structs
  */
 
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
-import { AbstractItem, AbstractItemRef } from './AbstractItem.js'
+import {
+  AbstractItem,
+  AbstractItemRef,
+  getItemCleanEnd,
+  getItemCleanStart,
+  getItemType,
+  Transaction, ID, AbstractType // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
-import { Y } from '../utils/Y.js' // eslint-disable-line
-import { ID } from '../utils/ID.js' // eslint-disable-line
-import { ItemType } from './ItemType.js' // eslint-disable-line
-import { getItemCleanEnd, getItemCleanStart, getItemType } from '../utils/StructStore.js'
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
 
 export const structFormatRefNumber = 4
 
diff --git a/src/structs/ItemJSON.js b/src/structs/ItemJSON.js
index 9271b966..21e041f3 100644
--- a/src/structs/ItemJSON.js
+++ b/src/structs/ItemJSON.js
@@ -2,15 +2,18 @@
  * @module structs
  */
 
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
-import { AbstractItem, AbstractItemRef, splitItem } from './AbstractItem.js'
+import {
+  AbstractItem,
+  AbstractItemRef,
+  getItemCleanEnd,
+  getItemCleanStart,
+  getItemType,
+  splitItem,
+  Transaction, ID, AbstractType // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
-import { Y } from '../utils/Y.js' // eslint-disable-line
-import { ID } from '../utils/ID.js' // eslint-disable-line
-import { ItemType } from './ItemType.js' // eslint-disable-line
-import { getItemCleanEnd, getItemCleanStart, getItemType } from '../utils/StructStore.js'
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
 
 export const structJSONRefNumber = 5
 
diff --git a/src/structs/ItemString.js b/src/structs/ItemString.js
index e0088efe..66785ac8 100644
--- a/src/structs/ItemString.js
+++ b/src/structs/ItemString.js
@@ -1,15 +1,18 @@
 /**
  * @module structs
  */
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
-import { AbstractItem, AbstractItemRef, splitItem } from './AbstractItem.js'
+import {
+  AbstractItem,
+  AbstractItemRef,
+  getItemCleanEnd,
+  getItemCleanStart,
+  getItemType,
+  splitItem,
+  Transaction, ID, AbstractType // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
-import { Y } from '../utils/Y.js' // eslint-disable-line
-import { ID } from '../utils/ID.js' // eslint-disable-line
-import { ItemType } from './ItemType.js' // eslint-disable-line
-import { getItemCleanEnd, getItemCleanStart, getItemType } from '../utils/StructStore.js'
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
 
 export const structStringRefNumber = 6
 
diff --git a/src/structs/ItemType.js b/src/structs/ItemType.js
index c065c615..906dd3db 100644
--- a/src/structs/ItemType.js
+++ b/src/structs/ItemType.js
@@ -4,22 +4,24 @@
 
 // TODO: ItemBinary should be able to merge with right (similar to other items). Or the other items (ItemJSON) should not be able to merge - extra byte + consistency
 
-import { ID } from '../utils/ID.js' // eslint-disable-line
-import { Y } from '../utils/Y.js' // eslint-disable-line
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
-import { AbstractItem, AbstractItemRef } from './AbstractItem.js'
+import {
+  AbstractItem,
+  AbstractItemRef,
+  getItemCleanEnd,
+  getItemCleanStart,
+  getItemType,
+  readYArray,
+  readYMap,
+  readYText,
+  readYXmlElement,
+  readYXmlFragment,
+  readYXmlHook,
+  readYXmlText,
+  Y, GC, ItemDeleted, Transaction, ID, AbstractType // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js' // eslint-disable-line
 import * as decoding from 'lib0/decoding.js'
-import { readYArray } from '../types/YArray.js'
-import { readYMap } from '../types/YMap.js'
-import { readYText } from '../types/YText.js'
-import { readYXmlElement, readYXmlFragment } from '../types/YXmlElement.js'
-import { readYXmlHook } from '../types/YXmlHook.js'
-import { readYXmlText } from '../types/YXmlText.js'
-import { getItemCleanEnd, getItemCleanStart, getItemType } from '../utils/StructStore.js'
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
-import { GC } from './GC.js' // eslint-disable-line
-import { ItemDeleted } from './ItemDeleted.js' // eslint-disable-line
 
 /**
  * @param {Y} y
diff --git a/src/types/AbstractType.js b/src/types/AbstractType.js
index 27924220..e57231ef 100644
--- a/src/types/AbstractType.js
+++ b/src/types/AbstractType.js
@@ -2,21 +2,26 @@
  * @module structs
  */
 
-import { Y } from '../utils/Y.js' // eslint-disable-line
-import * as eventHandler from '../utils/EventHandler.js'
-import { YEvent } from '../utils/YEvent.js' // eslint-disable-line
-import { AbstractItem } from '../structs/AbstractItem.js' // eslint-disable-line
-import { ItemType } from '../structs/ItemType.js' // eslint-disable-line
-import { Encoder } from 'lib0/encoding.js' // eslint-disable-line
-import { Transaction, nextID } from '../utils/Transaction.js' // eslint-disable-line
+import {
+  removeEventHandlerListener,
+  callEventHandlerListeners,
+  addEventHandlerListener,
+  createEventHandler,
+  ItemType,
+  nextID,
+  isVisible,
+  ItemJSON,
+  ItemBinary,
+  createID,
+  getItemCleanStart,
+  getItemCleanEnd,
+  Y, Snapshot, Transaction, EventHandler, YEvent, AbstractItem, // eslint-disable-line
+} from '../internals.js'
+
 import * as map from 'lib0/map.js'
-import { isVisible, Snapshot } from '../utils/Snapshot.js' // eslint-disable-line
-import { ItemJSON } from '../structs/ItemJSON.js'
-import { ItemBinary } from '../structs/ItemBinary.js'
-import { ID, createID } from '../utils/ID.js' // eslint-disable-line
-import { getItemCleanStart, getItemCleanEnd } from '../utils/StructStore.js'
 import * as iterator from 'lib0/iterator.js'
 import * as error from 'lib0/error.js'
+import * as encoding from 'lib0/encoding.js' // eslint-disable-line
 
 /**
  * @template EventType
@@ -46,14 +51,14 @@ export class AbstractType {
     this._length = 0
     /**
      * Event handlers
-     * @type {eventHandler.EventHandler<EventType,Transaction>}
+     * @type {EventHandler<EventType,Transaction>}
      */
-    this._eH = eventHandler.create()
+    this._eH = createEventHandler()
     /**
      * Deep event handlers
-     * @type {eventHandler.EventHandler<Array<YEvent>,Transaction>}
+     * @type {EventHandler<Array<YEvent>,Transaction>}
      */
-    this._dEH = eventHandler.create()
+    this._dEH = createEventHandler()
   }
 
   /**
@@ -80,7 +85,7 @@ export class AbstractType {
   }
 
   /**
-   * @param {Encoder} encoder
+   * @param {encoding.Encoder} encoder
    */
   _write (encoder) {
     throw new Error('unimplemented')
@@ -119,7 +124,7 @@ export class AbstractType {
    * @param {any} event
    */
   _callEventHandler (transaction, event) {
-    eventHandler.callEventListeners(this._eH, [event, transaction])
+    callEventHandlerListeners(this._eH, [event, transaction])
     const changedParentTypes = transaction.changedParentTypes
     /**
      * @type {AbstractType<EventType>}
@@ -141,7 +146,7 @@ export class AbstractType {
    * @param {function(EventType, Transaction):void} f Observer function
    */
   observe (f) {
-    eventHandler.addEventListener(this._eH, f)
+    addEventHandlerListener(this._eH, f)
   }
 
   /**
@@ -150,7 +155,7 @@ export class AbstractType {
    * @param {function(Array<YEvent>,Transaction):void} f Observer function
    */
   observeDeep (f) {
-    eventHandler.addEventListener(this._dEH, f)
+    addEventHandlerListener(this._dEH, f)
   }
 
   /**
@@ -159,7 +164,7 @@ export class AbstractType {
    * @param {function(EventType,Transaction):void} f Observer function
    */
   unobserve (f) {
-    eventHandler.removeEventListener(this._eH, f)
+    removeEventHandlerListener(this._eH, f)
   }
 
   /**
@@ -168,7 +173,7 @@ export class AbstractType {
    * @param {function(Array<YEvent>,Transaction):void} f Observer function
    */
   unobserveDeep (f) {
-    eventHandler.removeEventListener(this._dEH, f)
+    removeEventHandlerListener(this._dEH, f)
   }
 
   /**
diff --git a/src/types/YArray.js b/src/types/YArray.js
index 8b9ff161..f5a13941 100644
--- a/src/types/YArray.js
+++ b/src/types/YArray.js
@@ -2,11 +2,19 @@
  * @module types
  */
 
-import { AbstractItem } from '../structs/AbstractItem.js' // eslint-disable-line
-import { ItemType } from '../structs/ItemType.js' // eslint-disable-line
-import { AbstractType, typeArrayGet, typeArrayToArray, typeArrayForEach, typeArrayCreateIterator, typeArrayInsertGenerics, typeArrayDelete, typeArrayMap } from './AbstractType.js'
-import { YEvent } from '../utils/YEvent.js'
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
+import {
+  YEvent,
+  AbstractType,
+  typeArrayGet,
+  typeArrayToArray,
+  typeArrayForEach,
+  typeArrayCreateIterator,
+  typeArrayInsertGenerics,
+  typeArrayDelete,
+  typeArrayMap,
+  Transaction, ItemType, // eslint-disable-line
+} from '../internals.js'
+
 import * as decoding from 'lib0/decoding.js' // eslint-disable-line
 
 /**
diff --git a/src/types/YMap.js b/src/types/YMap.js
index 290db548..25f4d58e 100644
--- a/src/types/YMap.js
+++ b/src/types/YMap.js
@@ -2,11 +2,18 @@
  * @module types
  */
 
-import { AbstractType, typeMapDelete, typeMapSet, typeMapGet, typeMapHas, createMapIterator } from './AbstractType.js'
-import { ItemType } from '../structs/ItemType.js' // eslint-disable-line
-import { YEvent } from '../utils/YEvent.js'
+import {
+  YEvent,
+  AbstractType,
+  typeMapDelete,
+  typeMapSet,
+  typeMapGet,
+  typeMapHas,
+  createMapIterator,
+  Transaction, ItemType, // eslint-disable-line
+} from '../internals.js'
+
 import * as decoding from 'lib0/decoding.js' // eslint-disable-line
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
 import * as iterator from 'lib0/iterator.js'
 
 /**
diff --git a/src/types/YText.js b/src/types/YText.js
index a6057906..f949dae2 100644
--- a/src/types/YText.js
+++ b/src/types/YText.js
@@ -2,17 +2,19 @@
  * @module types
  */
 
-import { ItemEmbed } from '../structs/ItemEmbed.js'
-import { ItemString } from '../structs/ItemString.js'
-import { ItemFormat } from '../structs/ItemFormat.js'
-import { YEvent } from '../utils/YEvent.js'
-import { ItemType } from '../structs/ItemType.js' // eslint-disable-line
-import { AbstractType } from './AbstractType.js'
-import { AbstractItem } from '../structs/AbstractItem.js' // eslint-disable-line
-import { isVisible, Snapshot } from '../utils/Snapshot.js' // eslint-disable-line
-import { getItemCleanStart, StructStore } from '../utils/StructStore.js' // eslint-disable-line
-import { Transaction, nextID } from '../utils/Transaction.js' // eslint-disable-line
-import { createID } from '../utils/ID.js'
+import {
+  YEvent,
+  ItemEmbed,
+  ItemString,
+  ItemFormat,
+  AbstractType,
+  nextID,
+  createID,
+  getItemCleanStart,
+  isVisible,
+  ItemType, AbstractItem, Snapshot, StructStore, Transaction // eslint-disable-line
+} from '../internals.js'
+
 import * as decoding from 'lib0/decoding.js' // eslint-disable-line
 
 /**
diff --git a/src/types/YXmlElement.js b/src/types/YXmlElement.js
index e03df0d5..69f1479e 100644
--- a/src/types/YXmlElement.js
+++ b/src/types/YXmlElement.js
@@ -2,15 +2,22 @@
  * @module types
  */
 
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
+import {
+  YXmlEvent,
+  AbstractType,
+  typeArrayMap,
+  typeArrayForEach,
+  typeMapGet,
+  typeMapGetAll,
+  typeArrayInsertGenerics,
+  typeArrayDelete,
+  typeMapSet,
+  typeMapDelete,
+  Transaction, ItemType, YXmlText, YXmlHook, Snapshot // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
-import { YXmlEvent } from './YXmlEvent.js'
-import { ItemType } from '../structs/ItemType.js' // eslint-disable-line
-import { YXmlText } from './YXmlText.js' // eslint-disable-line
-import { YXmlHook } from './YXmlHook.js' // eslint-disable-line
-import { AbstractType, typeArrayMap, typeArrayForEach, typeMapGet, typeMapGetAll, typeArrayInsertGenerics, typeArrayDelete, typeMapSet, typeMapDelete } from './AbstractType.js'
-import { Snapshot } from '../utils/Snapshot.js' // eslint-disable-line
 
 /**
  * Define the elements to which a set of CSS queries apply.
diff --git a/src/types/YXmlEvent.js b/src/types/YXmlEvent.js
index 19c8aa10..38f4b727 100644
--- a/src/types/YXmlEvent.js
+++ b/src/types/YXmlEvent.js
@@ -2,11 +2,10 @@
  * @module types
  */
 
-import { YEvent } from '../utils/YEvent.js'
-
-import { AbstractType } from './AbstractType.js' // eslint-disable-line
-import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
-import { YXmlElement, YXmlFragment } from './YXmlElement.js' // eslint-disable-line
+import {
+  YEvent,
+  YXmlElement, YXmlFragment, Transaction // eslint-disable-line
+} from '../internals.js'
 
 /**
  * An Event that describes changes on a YXml Element or Yxml Fragment
diff --git a/src/types/YXmlHook.js b/src/types/YXmlHook.js
index 95a89f1d..a052ffad 100644
--- a/src/types/YXmlHook.js
+++ b/src/types/YXmlHook.js
@@ -2,7 +2,7 @@
  * @module types
  */
 
-import { YMap } from './YMap.js'
+import { YMap } from '../internals.js'
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
 
diff --git a/src/types/YXmlText.js b/src/types/YXmlText.js
index 69aeb10a..c410cb9c 100644
--- a/src/types/YXmlText.js
+++ b/src/types/YXmlText.js
@@ -2,7 +2,8 @@
  * @module types
  */
 
-import { YText } from './YText.js'
+import { YText } from '../internals.js'
+
 import * as decoding from 'lib0/decoding.js' // eslint-disable-line
 
 /**
diff --git a/src/utils/DeleteSet.js b/src/utils/DeleteSet.js
index 3b1f1137..dd3d8493 100644
--- a/src/utils/DeleteSet.js
+++ b/src/utils/DeleteSet.js
@@ -1,10 +1,13 @@
+
+import {
+  getItemRange,
+  StructStore, Transaction, ID // eslint-disable-line
+} from '../internals.js'
+
+import * as math from 'lib0/math.js'
 import * as map from 'lib0/map.js'
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
-import * as math from 'lib0/math.js'
-import { StructStore, getItemRange } from './StructStore.js' // eslint-disable-line
-import { Transaction } from './Transaction.js' // eslint-disable-line
-import { ID } from './ID.js' // eslint-disable-line
 
 class DeleteItem {
   /**
diff --git a/src/utils/EventHandler.js b/src/utils/EventHandler.js
index f6e89d85..f366338a 100644
--- a/src/utils/EventHandler.js
+++ b/src/utils/EventHandler.js
@@ -1,5 +1,3 @@
-import { Transaction } from './Transaction.js' // eslint-disable-line
-import { YEvent } from './YEvent.js' // eslint-disable-line
 import * as f from 'lib0/function.js'
 
 /**
@@ -20,7 +18,7 @@ export class EventHandler {
  * @template ARG0,ARG1
  * @returns {EventHandler<ARG0,ARG1>}
  */
-export const create = () => new EventHandler()
+export const createEventHandler = () => new EventHandler()
 
 /**
  * Adds an event listener that is called when
@@ -30,7 +28,7 @@ export const create = () => new EventHandler()
  * @param {EventHandler<ARG0,ARG1>} eventHandler
  * @param {function(ARG0,ARG1):void} f The event handler.
  */
-export const addEventListener = (eventHandler, f) =>
+export const addEventHandlerListener = (eventHandler, f) =>
   eventHandler.l.push(f)
 
 /**
@@ -41,7 +39,7 @@ export const addEventListener = (eventHandler, f) =>
  * @param {function(ARG0,ARG1):void} f The event handler that was added with
  *                     {@link EventHandler#addEventListener}
  */
-export const removeEventListener = (eventHandler, f) => {
+export const removeEventHandlerListener = (eventHandler, f) => {
   eventHandler.l = eventHandler.l.filter(g => f !== g)
 }
 
@@ -50,7 +48,7 @@ export const removeEventListener = (eventHandler, f) => {
  * @template ARG0,ARG1
  * @param {EventHandler<ARG0,ARG1>} eventHandler
  */
-export const removeAllEventListeners = eventHandler => {
+export const removeAllEventHandlerListeners = eventHandler => {
   eventHandler.l.length = 0
 }
 
@@ -62,5 +60,5 @@ export const removeAllEventListeners = eventHandler => {
  * @param {EventHandler<ARG0,ARG1>} eventHandler
  * @param {[ARG0,ARG1]} args
  */
-export const callEventListeners = (eventHandler, args) =>
+export const callEventHandlerListeners = (eventHandler, args) =>
   f.callAll(eventHandler.l, args)
diff --git a/src/utils/ID.js b/src/utils/ID.js
index 802e1bfc..114f7c47 100644
--- a/src/utils/ID.js
+++ b/src/utils/ID.js
@@ -2,10 +2,11 @@
  * @module utils
  */
 
+import { AbstractType } from '../internals' // eslint-disable-line
+
 import * as decoding from 'lib0/decoding.js'
 import * as encoding from 'lib0/encoding.js'
 import * as error from 'lib0/error.js'
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
 
 export class ID {
   /**
diff --git a/src/utils/Snapshot.js b/src/utils/Snapshot.js
index bebf987d..941be3c6 100644
--- a/src/utils/Snapshot.js
+++ b/src/utils/Snapshot.js
@@ -1,5 +1,9 @@
-import { DeleteSet, isDeleted } from './DeleteSet'
-import { AbstractItem } from '../structs/AbstractItem.js' // eslint-disable-line
+
+import {
+  DeleteSet,
+  isDeleted,
+  AbstractItem // eslint-disable-line
+} from '../internals.js'
 
 export class Snapshot {
   /**
diff --git a/src/utils/StructStore.js b/src/utils/StructStore.js
index 80fdcde9..27790373 100644
--- a/src/utils/StructStore.js
+++ b/src/utils/StructStore.js
@@ -1,8 +1,8 @@
-import { AbstractStruct } from '../structs/AbstractStruct.js' // eslint-disable-line
-import { AbstractItem } from '../structs/AbstractItem.js' // eslint-disable-line
-import { ItemType } from '../structs/ItemType.js' // eslint-disable-line
-import { ID } from './ID.js' // eslint-disable-line
-import { Transaction } from './Transaction.js' // eslint-disable-line
+
+import {
+  Transaction, ID, ItemType, AbstractItem, AbstractStruct // eslint-disable-line
+} from '../internals.js'
+
 import * as map from 'lib0/map.js'
 import * as math from 'lib0/math.js'
 import * as error from 'lib0/error.js'
diff --git a/src/utils/Transaction.js b/src/utils/Transaction.js
index 4119df95..1e33d6c8 100644
--- a/src/utils/Transaction.js
+++ b/src/utils/Transaction.js
@@ -2,16 +2,17 @@
  * @module utils
  */
 
+import {
+  getState,
+  createID,
+  writeStructsFromTransaction,
+  writeDeleteSet,
+  DeleteSet,
+  sortAndMergeDeleteSet,
+  AbstractType, AbstractItem, YEvent, ItemType, Y // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js'
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
-import { AbstractItem } from '../structs/AbstractItem.js' // eslint-disable-line
-import { Y } from './Y.js' // eslint-disable-line
-import { YEvent } from './YEvent.js' // eslint-disable-line
-import { ItemType } from '../structs/ItemType.js' // eslint-disable-line
-import { writeStructsFromTransaction } from './structEncoding.js'
-import { createID } from './ID.js' // eslint-disable-line
-import { writeDeleteSet, DeleteSet, sortAndMergeDeleteSet } from './DeleteSet.js'
-import { getState } from './StructStore.js'
 
 /**
  * A transaction is created for every change on the Yjs model. It is possible
diff --git a/src/utils/UndoManager.js b/src/utils/UndoManager.js
index 1e1f8b8a..69a72894 100644
--- a/src/utils/UndoManager.js
+++ b/src/utils/UndoManager.js
@@ -1,15 +1,17 @@
 // @ts-nocheck
 
-import * as ID from './ID.js'
-import { isParentOf } from './isParentOf.js'
+import {
+  isParentOf,
+  createID
+} from '../internals.js'
 
 class ReverseOperation {
   constructor (y, transaction, bindingInfos) {
     this.created = new Date()
     const beforeState = transaction.beforeState
     if (beforeState.has(y.userID)) {
-      this.toState = ID.createID(y.userID, y.ss.getState(y.userID) - 1)
-      this.fromState = ID.createID(y.userID, beforeState.get(y.userID))
+      this.toState = createID(y.userID, y.ss.getState(y.userID) - 1)
+      this.fromState = createID(y.userID, beforeState.get(y.userID))
     } else {
       this.toState = null
       this.fromState = null
@@ -51,7 +53,7 @@ function applyReverseOperation (y, scope, reverseBuffer) {
       const redoitems = new Set()
       for (let del of undoOp.deletedStructs) {
         const fromState = del.from
-        const toState = ID.createID(fromState.user, fromState.clock + del.len - 1)
+        const toState = createID(fromState.user, fromState.clock + del.len - 1)
         y.os.getItemCleanStart(fromState)
         y.os.getItemCleanEnd(toState)
         y.os.iterate(fromState, toState, op => {
diff --git a/src/utils/Y.js b/src/utils/Y.js
index 615f4914..d385bac7 100644
--- a/src/utils/Y.js
+++ b/src/utils/Y.js
@@ -1,21 +1,25 @@
-import { StructStore, findIndexSS } from './StructStore.js'
+import { } from './StructStore.js'
+
+import {
+  callEventHandlerListeners,
+  sortAndMergeDeleteSet,
+  StructStore,
+  findIndexSS,
+  Transaction,
+  AbstractType,
+  AbstractItem,
+  YArray,
+  YText,
+  YMap,
+  YXmlFragment,
+  YEvent, ItemDeleted, GC, AbstractStruct // eslint-disable-line
+} from '../internals.js'
+
+import { Observable } from 'lib0/observable.js'
+import * as error from 'lib0/error.js'
 import * as random from 'lib0/random.js'
 import * as map from 'lib0/map.js'
-import { Observable } from 'lib0/observable.js'
-import { Transaction } from './Transaction.js'
-import { AbstractStruct, AbstractRef } from '../structs/AbstractStruct.js' // eslint-disable-line
-import { AbstractType } from '../types/AbstractType.js'
-import { AbstractItem } from '../structs/AbstractItem.js'
-import { sortAndMergeDeleteSet } from './DeleteSet.js'
 import * as math from 'lib0/math.js'
-import { GC } from '../structs/GC.js' // eslint-disable-line
-import { ItemDeleted } from '../structs/ItemDeleted.js' // eslint-disable-line
-import { YArray } from '../types/YArray.js'
-import { YText } from '../types/YText.js'
-import { YMap } from '../types/YMap.js'
-import { YXmlFragment } from '../types/YXmlElement.js'
-import { YEvent } from './YEvent.js' // eslint-disable-line
-import * as eventHandler from './EventHandler.js'
 
 /**
  * A Yjs instance handles the state of shared data.
@@ -34,14 +38,6 @@ export class Y extends Observable {
      */
     this.share = new Map()
     this.store = new StructStore()
-    /**
-     * @type {Map<number, Map<number, AbstractRef>>}
-     */
-    this._missingStructs = new Map()
-    /**
-     * @type {Array<AbstractStruct>}
-     */
-    this._readyToIntegrate = []
     /**
      * @type {Transaction | null}
      */
@@ -54,7 +50,7 @@ export class Y extends Observable {
   get transaction () {
     const t = this._transaction
     if (t === null) {
-      throw new Error('All changes must happen inside a transaction')
+      throw error.create('All changes must happen inside a transaction')
     }
     return t
   }
@@ -98,7 +94,7 @@ export class Y extends Observable {
               })
             // we don't need to check for events.length
             // because we know it has at least one element
-            eventHandler.callEventListeners(type._dEH, [events, transaction])
+            callEventHandlerListeners(type._dEH, [events, transaction])
           })
           // when all changes & events are processed, emit afterTransaction event
           this.emit('afterTransaction', [this, transaction])
diff --git a/src/utils/YEvent.js b/src/utils/YEvent.js
index c2bb85ce..c908390c 100644
--- a/src/utils/YEvent.js
+++ b/src/utils/YEvent.js
@@ -1,8 +1,8 @@
-import { AbstractItem } from '../structs/AbstractItem.js' // eslint-disable-line
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
-import { Transaction } from './Transaction.js' // eslint-disable-line
-import { AbstractStruct } from '../structs/AbstractStruct.js' // eslint-disable-line
-import { isDeleted } from './DeleteSet.js'
+
+import {
+  isDeleted,
+  AbstractItem, AbstractType, Transaction, AbstractStruct // eslint-disable-line
+} from '../internals.js'
 
 /**
  * @module utils
diff --git a/src/utils/isParentOf.js b/src/utils/isParentOf.js
index 638bcc06..808212c7 100644
--- a/src/utils/isParentOf.js
+++ b/src/utils/isParentOf.js
@@ -2,8 +2,7 @@
  * @module utils
  */
 
-import { Y } from '../utils/Y.js' // eslint-disable-line
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
+import { AbstractType } from '../internals.js' // eslint-disable-line
 
 /**
  * Check if `parent` is a parent of `child`.
diff --git a/src/utils/relativePosition.js b/src/utils/relativePosition.js
index 4c48d097..cf1c992a 100644
--- a/src/utils/relativePosition.js
+++ b/src/utils/relativePosition.js
@@ -1,15 +1,20 @@
-/**
- * @module utils
- */
 
-import * as ID from './ID.js'
-import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
-import { AbstractItem } from '../structs/AbstractItem.js' // eslint-disable-line
+import {
+  find,
+  exists,
+  getItemType,
+  createID,
+  writeID,
+  readID,
+  compareIDs,
+  findRootTypeKey,
+  AbstractItem,
+  ID, StructStore, Y, AbstractType // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
 import * as error from 'lib0/error.js'
-import { find, exists, getItemType, StructStore } from './StructStore.js' // eslint-disable-line
-import { Y } from './Y.js' // eslint-disable-line
 
 /**
  * A relative position that is based on the Yjs model. In contrast to an
@@ -38,13 +43,13 @@ import { Y } from './Y.js' // eslint-disable-line
  */
 export class RelativePosition {
   /**
-   * @param {ID.ID|null} type
+   * @param {ID|null} type
    * @param {string|null} tname
-   * @param {ID.ID|null} item
+   * @param {ID|null} item
    */
   constructor (type, tname, item) {
     /**
-     * @type {ID.ID|null}
+     * @type {ID|null}
      */
     this.type = type
     /**
@@ -52,7 +57,7 @@ export class RelativePosition {
      */
     this.tname = tname
     /**
-     * @type {ID.ID | null}
+     * @type {ID | null}
      */
     this.item = item
   }
@@ -83,13 +88,13 @@ export const createAbsolutePosition = (type, offset) => new AbsolutePosition(typ
 
 /**
  * @param {AbstractType<any>} type
- * @param {ID.ID|null} item
+ * @param {ID|null} item
  */
 export const createRelativePosition = (type, item) => {
   let typeid = null
   let tname = null
   if (type._item === null) {
-    tname = ID.findRootTypeKey(type)
+    tname = findRootTypeKey(type)
   } else {
     typeid = type._item.id
   }
@@ -109,7 +114,7 @@ export const createRelativePositionByOffset = (type, offset) => {
     if (!t.deleted && t.countable) {
       if (t.length > offset) {
         // case 1: found position somewhere in the linked list
-        return createRelativePosition(type, ID.createID(t.id.client, t.id.clock + offset))
+        return createRelativePosition(type, createID(t.id.client, t.id.clock + offset))
       }
       offset -= t.length
     }
@@ -126,7 +131,7 @@ export const writeRelativePosition = (encoder, rpos) => {
   const { type, tname, item } = rpos
   if (item !== null) {
     encoding.writeVarUint(encoder, 0)
-    ID.writeID(encoder, item)
+    writeID(encoder, item)
   } else if (tname !== null) {
     // case 2: found position at the end of the list and type is stored in y.share
     encoding.writeUint8(encoder, 1)
@@ -134,7 +139,7 @@ export const writeRelativePosition = (encoder, rpos) => {
   } else if (type !== null) {
     // case 3: found position at the end of the list and type is attached to an item
     encoding.writeUint8(encoder, 2)
-    ID.writeID(encoder, type)
+    writeID(encoder, type)
   } else {
     throw error.unexpectedCase()
   }
@@ -154,7 +159,7 @@ export const readRelativePosition = (decoder, y, store) => {
   switch (decoding.readVarUint(decoder)) {
     case 0:
       // case 1: found position somewhere in the linked list
-      itemID = ID.readID(decoder)
+      itemID = readID(decoder)
       break
     case 1:
       // case 2: found position at the end of the list and type is stored in y.share
@@ -162,7 +167,7 @@ export const readRelativePosition = (decoder, y, store) => {
       break
     case 2: {
       // case 3: found position at the end of the list and type is attached to an item
-      type = ID.readID(decoder)
+      type = readID(decoder)
     }
   }
   return new RelativePosition(type, tname, itemID)
@@ -231,7 +236,7 @@ export const toRelativePosition = (apos, y) => {
     while (n !== null) {
       if (!n.deleted && n.countable) {
         if (n.length > offset) {
-          return createRelativePosition(type, ID.createID(n.id.client, n.id.clock + offset))
+          return createRelativePosition(type, createID(n.id.client, n.id.clock + offset))
         }
         offset -= n.length
       }
@@ -247,8 +252,8 @@ export const toRelativePosition = (apos, y) => {
  */
 export const compareRelativePositions = (a, b) => a === b || (
   a !== null && b !== null && (
-    (a.item !== null && b.item !== null && ID.compareIDs(a.item, b.item)) ||
+    (a.item !== null && b.item !== null && compareIDs(a.item, b.item)) ||
     (a.tname !== null && a.tname === b.tname) ||
-    (a.type !== null && b.type !== null && ID.compareIDs(a.type, b.type))
+    (a.type !== null && b.type !== null && compareIDs(a.type, b.type))
   )
 )
diff --git a/src/utils/structEncoding.js b/src/utils/structEncoding.js
index c85145fe..266ef4c2 100644
--- a/src/utils/structEncoding.js
+++ b/src/utils/structEncoding.js
@@ -1,20 +1,26 @@
+
+import {
+  findIndexSS,
+  exists,
+  ItemBinaryRef,
+  GCRef,
+  ItemDeletedRef,
+  ItemEmbedRef,
+  ItemFormatRef,
+  ItemJSONRef,
+  ItemStringRef,
+  ItemTypeRef,
+  writeID,
+  createID,
+  readID,
+  Transaction, AbstractStruct, AbstractRef, StructStore, ID // eslint-disable-line
+} from '../internals.js'
+
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
 import * as map from 'lib0/map.js'
-import { AbstractStruct, AbstractRef } from '../structs/AbstractStruct.js' // eslint-disable-line
 import * as binary from 'lib0/binary.js'
-import { Transaction } from './Transaction.js' // eslint-disable-line
-import { findIndexSS, exists, StructStore } from './StructStore.js' // eslint-disable-line
-import { writeID, createID, readID, ID } from './ID.js' // eslint-disable-line
 import * as iterator from 'lib0/iterator.js'
-import { ItemBinaryRef } from '../structs/ItemBinary.js'
-import { GCRef } from '../structs/GC.js'
-import { ItemDeletedRef } from '../structs/ItemDeleted.js'
-import { ItemEmbedRef } from '../structs/ItemEmbed.js'
-import { ItemFormatRef } from '../structs/ItemFormat.js'
-import { ItemJSONRef } from '../structs/ItemJSON.js'
-import { ItemStringRef } from '../structs/ItemString.js'
-import { ItemTypeRef } from '../structs/ItemType.js'
 
 /**
  * @typedef {Map<number, number>} StateMap
diff --git a/tests/index.js b/tests/index.js
index f4345138..6241d0dd 100644
--- a/tests/index.js
+++ b/tests/index.js
@@ -1,12 +1,13 @@
 
-import { runTests } from 'lib0/testing.js'
-import { isBrowser } from 'lib0/environment.js'
-import * as log from 'lib0/logging.js'
 import * as array from './y-array.tests.js'
 import * as map from './y-map.tests.js'
 import * as text from './y-text.tests.js'
 import * as xml from './y-xml.tests.js'
 
+import { runTests } from 'lib0/testing.js'
+import { isBrowser } from 'lib0/environment.js'
+import * as log from 'lib0/logging.js'
+
 if (isBrowser) {
   log.createVConsole(document.body)
 }
diff --git a/tests/testHelper.js b/tests/testHelper.js
index 47d024a2..da6240e8 100644
--- a/tests/testHelper.js
+++ b/tests/testHelper.js
@@ -1,13 +1,18 @@
 import * as Y from '../src/index.js'
+
+import {
+  createDeleteSetFromStructStore,
+  getStates,
+  AbstractItem,
+  DeleteSet, StructStore // eslint-disable-line
+} from '../src/internals.js'
+
 import * as t from 'lib0/testing.js'
 import * as prng from 'lib0/prng.js'
 import { createMutex } from 'lib0/mutex.js'
 import * as encoding from 'lib0/encoding.js'
 import * as decoding from 'lib0/decoding.js'
 import * as syncProtocol from 'y-protocols/sync.js'
-import { createDeleteSetFromStructStore, DeleteSet } from '../src/utils/DeleteSet.js' // eslint-disable-line
-import { getStates, StructStore } from '../src/utils/StructStore.js' // eslint-disable-line
-import { AbstractItem } from '../src/structs/AbstractItem.js' // eslint-disable-line
 
 /**
  * @param {TestYInstance} y
@@ -278,9 +283,6 @@ export const compare = users => {
     compareDS(createDeleteSetFromStructStore(users[i].store), createDeleteSetFromStructStore(users[i + 1].store))
     compareStructStores(users[i].store, users[i + 1].store)
   }
-  users.forEach(user =>
-    t.assert(user._missingStructs.size === 0)
-  )
   users.map(u => u.destroy())
 }
 
diff --git a/tests/y-array.tests.js b/tests/y-array.tests.js
index ab950806..bd94cd2c 100644
--- a/tests/y-array.tests.js
+++ b/tests/y-array.tests.js
@@ -1,4 +1,5 @@
 import { init, compare, applyRandomTests, TestYInstance } from './testHelper.js' // eslint-disable-line
+
 import * as Y from '../src/index.js'
 import * as t from 'lib0/testing.js'
 import * as prng from 'lib0/prng.js'
diff --git a/tests/y-map.tests.js b/tests/y-map.tests.js
index eae65910..359743df 100644
--- a/tests/y-map.tests.js
+++ b/tests/y-map.tests.js
@@ -1,4 +1,5 @@
 import { init, compare, applyRandomTests, TestYInstance } from './testHelper.js' // eslint-disable-line
+
 import * as Y from '../src/index.js'
 import * as t from 'lib0/testing.js'
 import * as prng from 'lib0/prng.js'
diff --git a/tests/y-text.tests.js b/tests/y-text.tests.js
index 1ef294d5..4e86b6d8 100644
--- a/tests/y-text.tests.js
+++ b/tests/y-text.tests.js
@@ -1,4 +1,5 @@
 import { init, compare } from './testHelper.js'
+
 import * as t from 'lib0/testing.js'
 
 /**
diff --git a/tests/y-xml.tests.js b/tests/y-xml.tests.js
index ad25d757..476e80e8 100644
--- a/tests/y-xml.tests.js
+++ b/tests/y-xml.tests.js
@@ -1,5 +1,6 @@
 import { init, compare } from './testHelper.js'
 import * as Y from '../src/index.js'
+
 import * as t from 'lib0/testing.js'
 
 /**