code: public boolean deleteMetricAsync(String metricName)
        throws ExecutionException, InterruptedException {
      // [START deleteMetricAsync]
      Future<Boolean> future = logging.deleteMetricAsync(metricName);
      // ...
      boolean deleted = future.get();
      if (deleted) {
        // the metric was deleted
      } else {
        // the metric was not found
      }
      // [END deleteMetricAsync]
      return deleted;
    }
docs: [VARIABLE "my_metric_name"]