auto* cell1 = TFE_MonitoringGetCellSampler1(sampler1, "foo");
  TFE_MonitoringSamplerCellAdd(cell1, 1.0);
  TFE_MonitoringSamplerCellAdd(cell1, 2.0);
  TF_Buffer* result1 = TF_NewBuffer();
  TFE_MonitoringSamplerCellValue(cell1, result1);
  tensorflow::HistogramProto histogram1;
  EXPECT_TRUE(histogram1.ParseFromString(
      {reinterpret_cast<const char*>(result1->data), result1->length}));
  EXPECT_EQ(histogram1.sum(), 3.0);

}

void TFE_MonitoringSamplerCellAdd(TFE_MonitoringSamplerCell* cell,
                                  double value) {
  cell->cell.Add(value);
}

void TFE_MonitoringSamplerCellValue(TFE_MonitoringSamplerCell* cell,
                                    TF_Buffer* buf) {
  string content;
  cell->cell.value().SerializeToString(&content);
  void* data = tensorflow::port::Malloc(content.length());

    TFE_MonitoringSamplerCell* cell, double value);

// Retrieves the current value of the cell. The return value is a HistogramProto
// saved in the buffer.
TF_CAPI_EXPORT extern void TFE_MonitoringSamplerCellValue(
    TFE_MonitoringSamplerCell* cell, TF_Buffer* buf);

// APIs for sampler buckets
typedef struct TFE_MonitoringBuckets TFE_MonitoringBuckets;
TF_CAPI_EXPORT extern TFE_MonitoringBuckets*