```c++
struct Z80
{
  volatile uint8_t& memory(const uint16_t address)
  {
    return *reinterpret_cast<uint8_t*>(address);
  }
};

int main()
{
  Z80 z80;

  auto useFreeLambda = [&]() {
    z80.memory(0xa000) = 0x10;
  };

  useFreeLambda();
  return 0;
}
```