Add documentation & clarification to clone method #622

src/types/YText.js

@@ -897,6 +897,10 @@ export class YText extends AbstractType {
   }
 
   /**
+   * Makes a copy of this data type that can be included somewhere else.
+   *
+   * Note that the content is only readable _after_ it has been included somewhere in the Ydoc.
+   *
    * @return {YText}
    */
   clone () {