code: func NewGroveRelayDriver(a DigitalWriter, pin string) *GroveRelayDriver {
  	return &GroveRelayDriver{
  		RelayDriver: NewRelayDriver(a, pin),
  	}
  }
docs: // NewGroveRelayDriver return a new GroveRelayDriver given a DigitalWriter and pin.
  //
  // Adds the following API Commands:
  //	"Toggle" - See RelayDriver.Toggle
  //	"On" - See RelayDriver.On
  //	"Off" - See RelayDriver.Off