Bug 188027 PasteAction is diabled
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/ContainerContext.java
*/
	public void add( Module module, DesignElement content )
	{
		if ( isSlot )
			container.add( content, containerSlotID );
		else
			container.add( module, content, containerProp );
	}
	/**
	 * 
	 * @param module
	 * @param content
	 */
	public void remove( Module module, DesignElement content )
	{
		if ( isSlot )
			container.remove( content, containerSlotID );
		else
			container.remove( module, content, containerProp );
	}
	/**
	 * 
	 * @param module
	 * @param content
	 * @return
	 */
	public boolean contains( Module module, DesignElement content )
	{
		return indexOf( module, content ) != -1;
	}