private @Nullable Object getSlowData(@NotNull String dataId, @NotNull Project project) {
    if (CommonDataKeys.PSI_ELEMENT.is(dataId)) {
      return JavaPsiFacade.getInstance(project).findClass(myClassName, GlobalSearchScope.allScope(project));
    }
    return null;
  }
private @Nullable Object getSlowData(@NotNull String dataId, @NotNull Project project)