parent = container.getExtendsElement( );
parent = extendsElement;
	public DesignElement getVirtualParent( )	{		if ( !isVirtualElement( ) )			return null;		// Find the out-most child element.		DesignElement parent = null;		DesignElement cur = this;		while ( cur.getContainer( ) != null )		{			DesignElement container = cur.getContainer( );			if ( container.getExtendsElement( ) != null )			{				parent = container.getExtendsElement( );				break;			}			cur = cur.getContainer( );		}		// The element is not in the tree.		if ( parent == null )			return null;		assert parent.getContainer( ) instanceof Module;		return parent.getRoot( ).getElementByID( baseId );	}