@Nullable
  public static PyTupleType create(@NotNull PsiElement anchor, @NotNull List<? extends PyType> elementTypes) {
    final PyClass tuple = PyBuiltinCache.getInstance(anchor).getClass(PyNames.TUPLE);
    if (tuple != null) {
      return new PyTupleType(tuple, elementTypes, false);
    }
    return null;
  }
@Nullable
  public static PyTupleType create(@NotNull PsiElement anchor, @NotNull List<? extends PyType> elementTypes)