code: def save(
      self, path: str = None, datetime_in_path: bool = True
  ) -> Tuple[str, dict]:
      data = {"evaluated": self.evaluated, "id": self.id}
      saved = json.dumps(data)
      return saved, {}
  
imports: import json
  import uuid
  from datetime import timedelta
  from typing import Tuple, Union, Optional, Sequence
  import pytest
  from golem.utilities.serializable import Serializable
  from fedot.remote.infrastructure.clients.client import Client
  from fedot.remote.remote_evaluator import RemoteEvaluator, RemoteTaskParams
label_desc: Use image node_id 3 for calling the MockSerializableGraph obj's underlying member method code with example usage: obj.save(path, datetime_in_path) and returns: saved,  dict