protected final void fireIndexedPropertyChange(String propertyName,int index,Object oldValue,Object newValue){
  PropertyChangeSupport aChangeSupport=this.changeSupport;
  if (aChangeSupport == null) {
    return;
  }
  aChangeSupport.fireIndexedPropertyChange(propertyName,index,oldValue,newValue);
}

protected final void fireIndexedPropertyChange ( String propertyName , int index , Object oldValue , Object newValue ) { PropertyChangeSupport aChangeSupport = this . changeSupport ; if ( aChangeSupport == null ) { return ; } aChangeSupport . fireIndexedPropertyChange ( propertyName , index , oldValue , newValue ) ; }
report a bound indexed property update to any registered listeners . < p > no event is fired if old and new values are equal and non - null .
