code: func (a *AdafruitMotorHatDriver) SetServoMotorPulse(channel byte, on, off int32) (err error) {
  	if err = a.setPWM(a.servoHatConnection, channel, on, off); err != nil {
  		return
  	}
  	return
  }
docs: // SetServoMotorPulse is a convenience function to specify the 'tick' value,
  // between 0-4095, when the signal will turn on, and when it will turn off.