Bug 183733 Implement the IScriptOjectClassInfo to provide the class infromation to support the JS code assistant.
Engine should implement the IScriptObjectClassInfo interface to return the class information for script object.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/script/internal/ListGroupScriptExecutor.java
} catch ( Exception e )
		{
			addException( context, e );
		}
	}
	private static IListGroupEventHandler getEventHandler(
			ListGroupHandle handle, ExecutionContext context )
	{
		IListGroupEventHandler eh = null;
		try
		{
			eh = ( IListGroupEventHandler ) getInstance( handle, context );
		} catch ( ClassCastException e )
		{
			addClassCastException( context, e, handle.getEventHandlerClass( ),
					IListGroupEventHandler.class );
		}
		return eh;
	}
	
	private static IListGroupEventHandler getEventHandler( ReportItemDesign design,
			ExecutionContext context )
	{
		ListGroupHandle handle = ( ListGroupHandle ) design.getHandle( );
		if ( handle == null )
			return null;
		return getEventHandler( handle, context );
	}
}