docs: def _get_value_from_json(self, dict_path, metrics_json):
          """
          Get a value from a dictionary under N keys, represented as str("key1.key2...key{n}")
          """
          for key in dict_path.split('.'):
              if key in metrics_json:
                  metrics_json = metrics_json.get(key)
              else:
                  return None
          return metrics_json