@Override
    public void contentRemoveQuery(@NotNull ContentManagerEvent event) {
      if (event.getContent() == myContent && myErrorsView != null && myErrorsView.canControlProcess() && !myErrorsView.isProcessStopped()) {
        if (!MessageDialogBuilder.yesNo(RelaxngBundle.message("relaxng.message-viewer.warning.message", myContentName),
                                       RelaxngBundle.message("relaxng.message-viewer.warning.title", myContentName))
              .ask(myErrorsView)) {
          event.consume();
        }
      }
    }
@Override
    public void contentRemoveQuery(@NotNull ContentManagerEvent event)