public void removeSelectionListener(final SelectionListener listener){
  checkWidget();
  if (listener == null) {
    SWT.error(SWT.ERROR_NULL_ARGUMENT);
  }
  listOfSelectionListeners.remove(listener);
}

public void removeSelectionListener ( final SelectionListener listener ) { checkWidget ( ) ; if ( listener == null ) { SWT . error ( SWT . ERROR_NULL_ARGUMENT ) ; } listOfSelectionListeners . remove ( listener ) ; }
removes the listener from the collection of listeners who will be notified when the control is selected by the user .
