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/command/PropertyCommand.java
private void doSetProperty( ElementPropertyDefn prop, Object value )
			throws ExtendedElementException, PropertyValueException
	{
		
		
		
		Object oldValue = element.getLocalProperty( module, prop );
		if ( oldValue == null && value == null )
			return;
		if ( oldValue != null && value != null && oldValue.equals( value ) )
			return;
		
		if ( element instanceof ExtendedItem )
		{
			ExtendedItem extendedItem = ( (ExtendedItem) element );
			if ( extendedItem.isExtensionModelProperty( prop.getName( ) )
					|| extendedItem.isExtensionXMLProperty( prop.getName( ) ) )
			{
				IReportItem extElement = extendedItem.getExtendedElement( );
				assert extElement != null;
				extElement.checkProperty( prop.getName( ), value );
				extElement.setProperty( prop.getName( ), value );
				return;
			}
		}
		PropertyRecord record = new PropertyRecord( element, prop, value );
		record.setEventTarget( getEventTarget( prop ) );
		getActivityStack( ).execute( record );
	}
	/**