sclass AWTOnConceptChangesByClass is AutoCloseable {
  settable JComponent component;
  settable Runnable action;
  settable Concepts concepts;
  settable Class conceptClass;
  settable int firstDelay;
  settable int delay = 500;
  
  volatile long changes = -1, changeCounter;
  javax.swing.Timer timer;
  AutoCloseable closer;
  
  *(Concepts *concepts, Class *conceptClass, JComponent *component, Runnable *action) {}
  
  void install {
    assertNotNull(concepts);
    assertNotNull(conceptClass);
    assertNotNull(component);
    
    bindToComponent(component, ->
      closer = onConceptChangeByClass_notOnAllChanged(concepts, conceptClass, -> ++changeCounter),
      -> { dispose closer; });
      
    timer = installTimer(component, delay, firstDelay, r _trigger);
  }
  
  void _trigger {
    long c = changeCounter;
    if (changes != c) {
      changes = c;
      action?.run();
    }
  }
  
  close { dispose timer; dispose closer; }
}

Began life as a copy of #1033869