type toJSON returns

src/types/YText.js

@@ -676,8 +676,7 @@ export class YText extends AbstractType {
   /**
    * Returns the unformatted string representation of this YText type.
    *
-   * Avoids undefined being returned when called as a nested type.
-   *
+   * @return {string}
    * @public
    */
   toJSON () {

src/types/YXmlFragment.js

@@ -242,6 +242,9 @@ export class YXmlFragment extends AbstractType {
     return typeListMap(this, xml => xml.toString()).join('')
   }
 
+  /**
+   * @return {string}
+   */
   toJSON () {
     return this.toString()
   }

src/types/YXmlText.js

@@ -70,6 +70,9 @@ export class YXmlText extends YText {
     }).join('')
   }
 
+  /**
+   * @return {string}
+   */
   toJSON () {
     return this.toString()
   }