static <A extends IHasChangeListeners> A updateChain(ChangeTriggerable b, A a) {
  ret onChange(a, b);
}

static <A extends IHasChangeListeners> A updateChain(Updateable b, A a) {
  ret onChange(a, b);
}

static <A extends JTextComponent> A updateChain(Updateable b, A a) {
  onChange(a, new UpdateTrigger(b));
  ret a;
}

static <A extends IHasChangeListeners> A updateChain(Runnable b, A a) {
  ret onChange(a, b);
}

static <A extends JTextComponent> A updateChain(Runnable b, A a) {
  onChange(a, b);
  ret a;
}

static <A extends JTextComponent> A updateChain(ChangeTriggerable b, A a) {
  if (b != null)
    onChange(a, new ChangeTrigger(b));
  ret a;
}

static <A extends Iterable> A updateChain(O b, A l) {
  fOr (a : l)
    call(mainFunctionHolder updateChain, b, a);
}