code: def test_retrieval_recall_at_5(self):
      metric = metrics.RecallAt5_ret()
      self._test_retrieval_recall_at_k_metric(metric, 0.4)
  
imports: import os
  import unittest
  import mmf.modules.metrics
  import torch
  from mmf.common.registry import registry
  from mmf.common.sample import Sample
  from mmf.datasets.processors import CaptionProcessor
  from mmf.utils.configuration import load_yaml
label_desc: Use image node_id 26 for calling the TestModuleMetrics obj's underlying member method code with example usage: obj.test_retrieval_recall_at_5() without return types