docs: def _submit_monotonic_count(self, metric_name, val, metric, custom_tags=None, hostname=None):
          """
          Submit a metric as a monotonic count, additional tags provided will be added to
          the ones from the label provided via the metrics object.
  
          `custom_tags` is an array of 'tag:value' that will be added to the
          metric when sending the monotonic count to Datadog.
          """
  
          _tags = self._metric_tags(metric_name, val, metric, custom_tags, hostname)
          self.monotonic_count('{}.{}'.format(self.NAMESPACE, metric_name), val, _tags, hostname=hostname)