private boolean fireContentRemoveQuery(@NotNull Content content, int oldIndex) {
    ContentManagerEvent event = new ContentManagerEvent(this, content, oldIndex, ContentManagerEvent.ContentOperation.undefined);
    for (ContentManagerListener listener : myDispatcher.getListeners()) {
      listener.contentRemoveQuery(event);
      if (event.isConsumed()) {
        return false;
      }
    }
    return true;
  }
private boolean fireContentRemoveQuery(@NotNull Content content, int oldIndex)