*/
  final boolean casListeners(@Nullable Listener expect, Listener update) {
    return ATOMIC_HELPER.casListeners(this, expect, update);
  }

  /**
   * Performs a {@linkplain java.lang.invoke.VarHandle#getAndSet get-and-set} operation on {@link
   * #listenersField}.
   */
  final @Nullable Listener gasListeners(Listener update) {
    return ATOMIC_HELPER.gasListeners(this, update);
  }

  /**

        .filter(
            m ->
                m.getName().equals("getDoneValue")
                    || m.getName().equals("casValue")
                    || m.getName().equals("casListeners")
                    || m.getName().equals("gasListeners"))
        .forEach(ignoredMembers::add);
  }

  /**
   * Sets a default value that can be used for any parameter of type {@code type}. Returns this
   * object.
   */

        .filter(
            m ->
                m.getName().equals("getDoneValue")
                    || m.getName().equals("casValue")
                    || m.getName().equals("casListeners")
                    || m.getName().equals("gasListeners"))
        .forEach(ignoredMembers::add);
  }

  /**
   * Sets a default value that can be used for any parameter of type {@code type}. Returns this
   * object.
   */

    //    executing listeners in the order they were added
    // 3. push all the items onto 'onto' and return the new head of the stack
    Listener head = gasListeners(Listener.TOMBSTONE);
    Listener reversedList = onto;
    while (head != null) {
      Listener tmp = head;
      head = head.next;
      tmp.next = reversedList;
      reversedList = tmp;
    }