@Nullable
  private static PsiFile findPyFileInDir(PsiDirectory dir, String referencedName, boolean withoutStubs) {
    PsiFile file = null;
    if (!withoutStubs) {
      final var stub = dir.findFile(referencedName + PyNames.DOT_PYI);
      if (!PyiStubSuppressor.isIgnoredStub(stub)) {
        file =  stub;
      }
    }
    if (file == null) {
      file = dir.findFile(referencedName + PyNames.DOT_PY);
    }
    // TODO: in case of real users need make an extension point out of the following code
    // if (file == null) {
    //  final List<FileNameMatcher> associations = FileTypeManager.getInstance().getAssociations(PythonFileType.INSTANCE);
    //  for (FileNameMatcher association : associations) {
    //    if (association instanceof ExtensionFileNameMatcher) {
    //      file = dir.findFile(referencedName + "." + ((ExtensionFileNameMatcher)association).getExtension());
    //      if (file != null) break;
    //    }
    //  }
    //}
    if (file != null && FileUtilRt.getNameWithoutExtension(file.getName()).equals(referencedName)) {
      return file;
    }
    return null;
  }
@Nullable
  private static PsiFile findPyFileInDir(PsiDirectory dir, String referencedName, boolean withoutStubs)