code: def _get_valid_config(self):
      return {
          "name": "step_with_fixed_gamma",
          "base_value": 1,
          "gamma": 0.1,
          "num_decays": 3,
          "num_epochs": self._num_epochs,
      }
  
file_path: ClassyVision/test/optim_param_scheduler_step_with_fixed_gamma_test.py
imports: import copy
  import unittest
  from classy_vision.optim.param_scheduler import build_param_scheduler, StepWithFixedGammaParamScheduler
label_desc: Use image node_id 1 for calling the TestStepWithFixedGammaScheduler obj's underlying member method code with example usage: obj._get_valid_config() and returns: dict