Bug 138562 Splite extendsexcpetion to seperate sub class
The suggestion is Parent invalid Cycle extends Different type extends Not top level extends
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
broadcast( ev, getRoot( ) );
	}
	/**
	 * Implements to broadcast an event to all listeners of this design element
	 * on a design tree. Note subclasses should override this method to change
	 * the behavior of broadcast method.
	 * 
	 * Part of: Notification system.
	 * 
	 * @param ev
	 *            the event to send
	 * @param module
	 *            the root node of the design tree.
	 */
	public void broadcast( NotificationEvent ev, Module module )
	{
		
		
		
		if ( listeners != null )
		{
			ArrayList tmpListeners = new ArrayList( listeners );
			Iterator iter = tmpListeners.iterator( );
			while ( iter.hasNext( ) )
			{
				( (Listener) iter.next( ) ).elementChanged(
						getHandle( module ), ev );
			}
		}