// Execute.
  TF_ExecuteOperation(op, 2, inputs, o, status.get());
  ASSERT_EQ(TF_OK, TF_GetCode(status.get())) << TF_Message(status.get());

  // Clean up operation and inputs.
  TF_DeleteAbstractOp(op);
  TF_DeleteAbstractTensor(at);

  // Verify the results.
  ASSERT_EQ(1, TF_OutputListNumOutputs(o));
  TF_AbstractTensor* result = TF_OutputListGet(o, 0);
  TFE_TensorHandle* result_t =

}

void TF_DeleteExecutionContext(TF_ExecutionContext* c) { unwrap(c)->Release(); }

TF_AbstractOp* TF_NewAbstractOp(TF_ExecutionContext* c) {
  return wrap((unwrap(c)->CreateOperation()));
}

void TF_DeleteAbstractOp(TF_AbstractOp* op) { unwrap(op)->Release(); }

void TF_DeleteAbstractTensor(TF_AbstractTensor* t) { unwrap(t)->Unref(); }

TF_OutputList* TF_NewOutputList() { return wrap(new OutputList); }