for (Operation* user : op->getResult(index).getUsers()) {
      work_list_.push_back(user);
    }
  }

  // Adds the defining op of index-th operand of op to the work list.
  void AddOperandToList(Operation* op, const int index) {
    if (Operation* operand_op = op->getOperand(index).getDefiningOp();
        operand_op != nullptr) {
      work_list_.push_back(operand_op);
    }
  }

    rescale.pos = RequantizeState::ON_OUTPUT;
    rescale.params = quantized_type;
    rescale.users.emplace_back(op, operand_index);
    return true;
  }

  state.params = quantized_type;
  AddOperandToList(op, operand_index);
  return true;
}

void QuantizationDriver::QuantizeOpResult(Operation* op, const int result_index,
                                          const QuantizedType quantized_type) {