const float* values, const char* name) {
    unique_tensor_ptr tensor(FloatTensor2x2(values), TF_DeleteTensor);
    TF_OperationDescription* desc = TF_NewOperation(graph, "Const", name);
    TF_SetAttrTensor(desc, "value", tensor.get(), s);
    if (TF_GetCode(s) != TF_OK) return nullptr;
    TF_SetAttrType(desc, "dtype", TF_FLOAT);
    TF_Operation* op = TF_FinishOperation(desc, s);

    TF_OperationDescription* desc, const char* attr_name,
    const void* const* protos, const size_t* proto_lens, int num_shapes,
    TF_Status* status);

TF_CAPI_EXPORT extern void TF_SetAttrTensor(TF_OperationDescription* desc,
                                            const char* attr_name,
                                            TF_Tensor* value,
                                            TF_Status* status);