@Nullable
  static LargeFileEditor tryGetLargeFileEditorManager(AnActionEvent e) {
    FileEditor fileEditor = getFileEditor(e);
    if (fileEditor instanceof LargeFileEditor) {
      return (LargeFileEditor)fileEditor;
    }

    Editor editor = getEditor(e);
    return editor == null ? null : tryGetLargeFileEditorManagerFromEditor(editor);
  }
@Nullable
  static LargeFileEditor tryGetLargeFileEditorManager(AnActionEvent e)