@SuppressWarnings("unchecked")
public CommonMultipleDockableFactory( String id, MultipleCDockableFactory<?, ?> delegate, CControlAccess access, CPerspective perspective ){
this.id = id;
this.delegate = (MultipleCDockableFactory<MultipleCDockable, MultipleCDockableLayout>)delegate;
this.controlAccess = access;
this.perspectiveIdentifiers = new CPerspectiveMultipleIdentifierCollection( id, perspective );
}