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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 _host_notification(self, context, method, payload, host):
 """Notify the cfg agent that is handling the hosting device."""

        LOG.debug('Notify Cisco cfg agent at %(host)s the message '
                  '%(method)s', {'host': host, 'method': method})
        cctxt = self.client.prepare(server=host)
        cctxt.cast(context, method, payload=payload)