Bug 188027 PasteAction is diabled
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/ContainerContext.java
* 
	 * @param module
	 * @param propName
	 * @param from
	 * @param to
	 */
	private void move( Module module, String propName, int from, int to )
	{
		PropertyDefn defn = container.getPropertyDefn( propName );
		assert defn.isList( )
				&& defn.getTypeCode( ) == IPropertyType.ELEMENT_TYPE;
		List items = container.getListProperty( module, propName );
		assert items != null;
		assert from >= 0 && from < items.size( );
		assert to >= 0 && to < items.size( );
		if ( from == to )
			return;
		Object obj = items.remove( from );
		items.add( to, obj );
	}
	/**
	 * Clears all the contents in the container.
	 * 
	 */
	public void clearContents( )
	{
		if ( isSlot )
		{
			ContainerSlot slot = container.getSlot( containerSlotID );
			if ( slot != null )