public void dockableUnregistered( DockController controller, Dockable dockable ) {
if( dockable instanceof CommonDockable ){
CDockable cdock = ((CommonDockable)dockable).getDockable();
CDockableAccess access = accesses.get( cdock );
if( access != null ){
access.informVisibility( false );
}
for( CControlListener listener : listeners() )
listener.closed( CControl.this, cdock );