code: def _kernel_manager_class_default(self):
      return "tests.utils.SyncKMSubclass"
  
imports: import json
  import os
  import sys
  from typing import Dict
  import pytest
  from jupyter_client import AsyncKernelManager, AsyncMultiKernelManager, KernelManager, MultiKernelManager
label_desc: Use image node_id 1 for calling the MKMSubclass obj's underlying member method code with example usage: obj._kernel_manager_class_default() and returns: str