Gets a single stream.

        :param str stream: The name of the stream.
        :rtype: .Stream

def get_stream(self, stream):
        """
        Gets a single stream.

        :param str stream: The name of the stream.
        :rtype: .Stream
        """
        path = '/archive/{}/streams/{}'.format(self._instance, stream)
        response = self._client.get_proto(path=path)
        message = archive_pb2.StreamInfo()
        message.ParseFromString(response.content)
        return Stream(message)