code: func NewPWMPin(pin int) *PWMPin {
  	return &PWMPin{
  		pin:     strconv.Itoa(pin),
  		enabled: false,
  		Path:    "/sys/class/pwm/pwmchip0",
  		read:    readPwmFile,
  		write:   writePwmFile}
  }
docs: // NewPwmPin returns a new pwmPin