code: def __init__(self, session_id: str):
      self._session_id = session_id
      self.req = None
  
imports: import unittest
  import uuid
  from collections.abc import Generator
  from typing import Optional, Any
  from pyspark.testing.connectutils import should_test_connect, connect_requirement_message
  from pyspark.testing.utils import eventually
label_desc: Use image node_id 1 to create a new MockService object  with example: obj = MockService(session_id)