// Helper functions for compute method
bool IsSameSize(TF_Tensor* tensor1, TF_Tensor* tensor2);
// Returns a string representation of a single tag or empty string if there
// are multiple tags
std::string SingleTag(TF_Tensor* tags);

template <typename T>
void ScalarSummaryOp_Compute(void* kernel, TF_OpKernelContext* ctx) {
  Params params(ctx);
  if (TF_GetCode(params.status) != TF_OK) {