code: def __call__(self, engine, logger, event_name, **kwargs):
      tag_prefix = f"{self.tag}/" if self.tag else ""
      params = {
          f"{tag_prefix}{self.param_name}/group_{i}": float(
              param_group[self.param_name]
          )
          for i, param_group in enumerate(self.optimizer.param_groups)
      }
      return params
  
imports: from typing import Any, Union
  from unittest.mock import call, MagicMock
  import pytest
  import torch
  from ignite.contrib.handlers.base_logger import BaseLogger, BaseOptimizerParamsHandler, BaseOutputHandler, BaseWeightsHandler, BaseWeightsScalarHandler
  from ignite.engine import Engine, Events, EventsList, State
  from tests.ignite.contrib.handlers import MockFP16DeepSpeedZeroOptimizer
label_desc: Use image node_id 1 for calling the DummyOptParamsHandler obj's underlying member method code with example usage: obj.__call__(engine, logger, event_name) and returns: params