Bug 176436 Charts Imported from Libraries do not update when libraries change
During a live presentation of BIRT at EclipseCon, we came across a rather embarassing issue. When charts are included in a library, and imported into a report design from a library, any changes to the library instance of the chart do not reflect in the report itself.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DesignElementHandle.java
public Iterator getPropertyIterator( )
	{
		return new PropertyIterator( this );
	}
	/**
	 * Registers a change event listener. A listener receives notifications each
	 * time an element changes. A listener can be registered any number of
	 * times, but will receive each event only once.
	 * 
	 * @param obj
	 *            the listener to register
	 */
	public void addListener( Listener obj )
	{
		getElement( ).addListener( obj );
	}
	/**
	 * Removes a given listener. If the listener registered, then the request is
	 * silently ignored.
	 * 
	 * @param obj
	 *            the listener to de-register
	 */
	public void removeListener( Listener obj )
	{
		getElement( ).removeListener( obj );
	}
	/**
	 * Returns an iterator over the elements that derive from this one.
	 *