code: def test_child_override(self):
      in_parse(
          ["ChildTaskWithNewConfig"],
          lambda task: self.assertEqual(
              task.param_a, "config a from config class 2"
          ),
      )
      in_parse(
          ["ChildTaskWithNewConfig"],
          lambda task: self.assertEqual(task.param_b, "config b"),
      )
  
imports: import unittest
  import luigi
  from luigi.cmdline_parser import CmdlineParser
  import gokart
  from gokart.config_params import inherits_config_params
label_desc: Use image node_id 3 for calling the TestInheritsConfigParam obj's underlying member method code with example usage: obj.test_child_override() without return types