@Override
  public void update(AnActionEvent e) {
    Presentation presentation = e.getPresentation();

    Project project = e.getProject();
    if (project == null) {
      presentation.setEnabled(false);
      return;
    }

    final DataContext dataContext = e.getDataContext();
    Editor editor = getEditor(dataContext, project, true);
    if (editor == null) {
      presentation.setEnabled(false);
      return;
    }

    final PsiFile file = PsiUtilBase.getPsiFileInEditor(editor, project);
    if (file == null) {
      presentation.setEnabled(false);
      return;
    }

    update(presentation, project, editor, file, dataContext, e.getPlace());
  }
 protected void update(
     @NotNull Presentation presentation,
     @NotNull Project project,
     @NotNull Editor editor,
     @NotNull PsiFile file) {
   presentation.setEnabled(isValidForFile(project, editor, file));
 }