class TFL_TensorOf<list<Type> allowedRuntimeTypes,
                   list<Type> allowedOpTypes = [AnyType]> :
  TensorOf<allowedOpTypes>, TFL_RuntimeType<TensorOf<allowedRuntimeTypes>> {
  // Set the summary equal to that representing the runtime types.
  let summary = TensorOf<allowedRuntimeTypes>.summary;
}

class TFL_TensorOfOrNone<list<Type> allowedRuntimeTypes, string description = "",