private static @NonNls String getThreadingDiagnostics(@NotNull PsiFile psiFile) {
    return "psiFile: " + psiFile +
           "; psiFile.getViewProvider(): " + psiFile.getViewProvider() +
           "; psiFile.isPhysical(): " + psiFile.isPhysical() +
           "; nonPhysicalOrInjected: " + isNonPhysicalOrInjected(psiFile);
  }
private static @NonNls String getThreadingDiagnostics(@NotNull PsiFile psiFile)