Method ~MyBuffer

cpp/src/arrow/c/bridge_test.cc:1326–1328

  using MutableBuffer::MutableBuffer;

  ~MyBuffer() override {
    default_memory_pool()->Free(const_cast<uint8_t*>(data_), size_);
  }

  std::shared_ptr<Device::SyncEvent> device_sync_event() const override {
    return device_sync_;