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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 get_metrics(self):
 """Get a metric for each gauge in the registry at the current time. :rtype: set(:class:`opencensus.metrics.export.metric.Metric`) :return: A set of `Metric`s, one for each registered gauge. """

        now = datetime.utcnow()
        metrics = set()
        for gauge in self.gauges.values():
            metrics.add(gauge.get_metric(now))
        return metrics