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/ImageScriptExecutor.java
}
	private static IImageEventHandler getEventHandler( ReportItemDesign design,
			ExecutionContext context )
	{
		DesignElementHandle designHandle = design.getHandle( );
		if ( !( designHandle instanceof ImageHandle ))
		{
			return null;
		}
		ImageHandle handle = ( ImageHandle ) designHandle;
		if ( handle == null )
			return null;
		return getEventHandler( handle, context );
	}
	private static IImageEventHandler getEventHandler( ImageHandle handle,
			ExecutionContext context )
	{
		IImageEventHandler eh = null;
		try
		{
			eh = ( IImageEventHandler ) getInstance( handle, context );
		} catch ( ClassCastException e )
		{
			addClassCastException( context, e, handle.getEventHandlerClass( ),
					IImageEventHandler.class );
		}
		return eh;
	}
}