->points.at(0)
                     ->histogram_value.sum());

  TFE_MonitoringSamplerCellAdd(cell, 5.0);
  metrics = collection_registry->CollectMetrics(options);
  EXPECT_EQ(6.0, metrics->point_set_map.at("test/sampler")
                     ->points.at(0)
                     ->histogram_value.sum());
  TFE_MonitoringDeleteBuckets(buckets);
  TFE_MonitoringDeleteSampler0(sampler);