def METHOD_NAME(self, batch_id: str, value: MetricValue) -> None:
    """
    Adds passed resolved metric "value" to list for corresponding "batch_id" key.
    """
    if self.metric_values_by_batch_id is None:
        self.metric_values_by_batch_id = {}
    self.metric_values_by_batch_id[batch_id] = value