code: def get_metric_history(
      self, run_id, metric_key, max_results=None, page_token=None
  ):
      raise NotImplementedError()
  
imports: from unittest import mock
  from mlflow.entities import ViewType
  from mlflow.store.tracking import SEARCH_MAX_RESULTS_DEFAULT
  from mlflow.store.tracking.abstract_store import AbstractStore
label_desc: Use image node_id 12 for calling the AbstractStoreTestImpl obj's underlying member method code with example usage: obj.get_metric_history(run_id, metric_key, max_results, page_token) without return types