@Override void replacedText(CharacterDataImpl node){
  if (ranges != null) {
    notifyRangesReplacedText(node);
  }
}

@ Override void replacedText ( CharacterDataImpl node ) { if ( ranges != null ) { notifyRangesReplacedText ( node ) ; } }
a method to be called when some text was changed in a text node , so that live objects can be notified .
