@Nullable
  private static PyType getNominalType(@NotNull PsiElement anchor, @NotNull String typeString) {
    final PyExpression expression = PyUtil.createExpressionFromFragment(typeString, anchor);
    if (expression != null) {
      final PyBuiltinCache builtinCache = PyBuiltinCache.getInstance(anchor);
      if (expression instanceof PyStringLiteralExpression) {
        return builtinCache.getStrType();
      }
      if (expression instanceof PyNumericLiteralExpression) {
        return builtinCache.getIntType();
      }
    }
    return null;
  }
@Nullable
  private static PyType getNominalType(@NotNull PsiElement anchor, @NotNull String typeString)