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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _item_to_metric(iterator, log_metric_pb):
 """Convert a metric protobuf to the native object. :type iterator: :class:`~google.api_core.page_iterator.Iterator` :param iterator: The iterator that is currently in use. :type log_metric_pb: :class:`.logging_metrics_pb2.LogMetric` :param log_metric_pb: Metric protobuf returned from the API. :rtype: :class:`~google.cloud.logging.metric.Metric` :returns: The next metric in the page. """

    # NOTE: LogMetric message type does not have an ``Any`` field
    #       so `MessageToDict`` can safely be used.
    resource = MessageToDict(log_metric_pb)
    return Metric.from_api_repr(resource, iterator.client)