class_docstr: An object which handles communicating with metadata db through MLMD.
code: def after_generating_trial_model(self, trial_id):
      return
  
file_path: model_search/model_search/metadata/mock_metadata.py
imports: from model_search.metadata import metadata
label_desc: Use image node_id 4 for calling the MockMetaData obj's underlying member method code with example usage: obj.after_generating_trial_model(trial_id) without return types