private EditorInlineHtmlPane getLoadingPane(@NotNull Editor editor) {
    EditorInlineHtmlPane pane = editor.getUserData(CACHED_LOADING_PANE);
    if (pane == null) {
      editor.putUserData(CACHED_LOADING_PANE, pane = createEditorPane(
        editor, CodeInsightBundle.message("doc.render.loading.text"), null, true));
    }
    return pane;
  }
private EditorInlineHtmlPane getLoadingPane(@NotNull Editor editor)