Bug 160176 Create design by a template
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignSession.java
broadcastResourceChangeEvent( ev );
	}
	/**
	 * Adds one resource change listener. The duplicate listener will not be
	 * added.
	 * 
	 * @param listener
	 *            the resource change listener to add
	 */
	public void addResourceChangeListener( IResourceChangeListener listener )
	{
		if ( resourceChangeListeners == null )
			resourceChangeListeners = new ArrayList( );
		if ( !resourceChangeListeners.contains( listener ) )
			resourceChangeListeners.add( listener );
	}
	/**
	 * Removes one resource change listener. If the listener not registered,
	 * then the request is silently ignored.
	 * 
	 * @param listener
	 *            the resource change listener to remove
	 * @return <code>true</code> if <code>listener</code> is successfully
	 *         removed. Otherwise <code>false</code>.
	 * 
	 */
	public boolean removeResourceChangeListener(
			IResourceChangeListener listener )
	{
		if ( resourceChangeListeners == null )