code: protected JFrame getParentWindowControl() {
          // allow subclasses to derive where the application window comes from
          final ApplicationWindow applicationWindow = getApplicationWindow();
          if (applicationWindow == null) {
              return ValkyrieRepository.getInstance().getApplicationConfig().windowManager().getActiveWindow().getControl();
          }
          return applicationWindow.getControl();
      }
docs: Returns the {@link javax.swing.JFrame} of the application window that this command belongs to.
  
  @return The control component of the application window, never null.