TFE_MonitoringSampler1* sampler, const char* label1);

// APIs for Sampler with 2 label.
typedef struct TFE_MonitoringSampler2 TFE_MonitoringSampler2;
TF_CAPI_EXPORT extern TFE_MonitoringSampler2* TFE_MonitoringNewSampler2(
    const char* name, TFE_MonitoringBuckets* buckets, TF_Status* out_status,
    const char* description, const char* label1, const char* label2);
TF_CAPI_EXPORT extern void TFE_MonitoringDeleteSampler2(

      {reinterpret_cast<const char*>(result1->data), result1->length}));
  EXPECT_EQ(histogram1.sum(), 3.0);
  TF_DeleteBuffer(result1);
  TFE_MonitoringDeleteSampler1(sampler1);

  auto* sampler2 = TFE_MonitoringNewSampler2("test/sampler2", buckets, status,
                                             "test", "label1", "label2");
  CHECK_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);

    TFE_MonitoringSampler1* sampler, const char* label1) {
  return static_cast<TFE_MonitoringSamplerCell*>(
      static_cast<void*>(sampler->sampler->GetCell(label1)));
}

TFE_MonitoringSampler2* TFE_MonitoringNewSampler2(
    const char* name, TFE_MonitoringBuckets* buckets, TF_Status* status,
    const char* description, const char* label1, const char* label2) {
  auto* result = new TFE_MonitoringSampler2(