def get_metrics(self):
        """
        Retrieve the current metric values for this :term:`Metrics Context`
        resource from the HMC.

        The metric values are returned by this method as a string in the
        `MetricsResponse` format described with the 'Get Metrics' operation in
        the :term:`HMC API` book.

        The :class:`~zhmcclient.MetricsResponse` class can be used to process
        the `MetricsResponse` string returned by this method, and provides
        structured access to the metrics values.

        Returns:

          :term:`string`:
            The current metric values, in the `MetricsResponse` string format.

        Raises:

          :exc:`~zhmcclient.HTTPError`
          :exc:`~zhmcclient.ParseError`
          :exc:`~zhmcclient.AuthError`
          :exc:`~zhmcclient.ConnectionError`
        """
        metrics_response = self.manager.session.get(self.uri)
        return metrics_response