code: def test_group_by_user(self):
      self.assertTrue(
          run_parms(
              {
                  "eval_args": [
                      {"group_by": "user"},
                      {"group_by": "None"},
                  ]
              }
          )
      )
  
imports: import os
  import sys
  import unittest
  import logging
  import warnings
  import numpy
  from recbole.quick_start import run_recbole
label_desc: Use image node_id 21 for calling the TestOverallConfig obj's underlying member method code with example usage: obj.test_group_by_user() without return types