@TestOnly
  public static void waitForIdentifierHighlighting() {
    // wait for async "highlight identifier" computation to apply in com.intellij.codeInsight.highlighting.BackgroundHighlighter.updateHighlighted
    NonBlockingReadActionImpl.waitForAsyncTaskCompletion();
    NonBlockingReadActionImpl.waitForAsyncTaskCompletion();
  }
@TestOnly
  public static void waitForIdentifierHighlighting()