func (t AWBType) Convert() (string, bool) {  
	switch t {
	case AwbAuto:
		return "auto", true
	case AwbOff:
		return "off", false
	case AwbSun:
		return "sun", false
	case AwbCloud:
		return "cloud", false
	case AwbShade:
		return "shade", false
	case AwbTungsten:
		return "tungsten", false
	case AwbFluorescent:
		return "fluorescent", false
	case AwbIncandescent:
		return "incandescent", false
	case AwbFlash:
		return "flash", false
	case AwbHorizon:
		return "horizon", false
	default:
		return "", true
	}
}
Convert takes the type and returns the string representation of that value.
Returns true as well if it is the default value.
package piCamera
import (
	"fmt"
)
type AWBType int
const (
	AwbAuto AWBType = iota
	AwbOff
	AwbSun
	AwbCloud
	AwbShade
	AwbTungsten
	AwbFluorescent
	AwbIncandescent
	AwbFlash
	AwbHorizon
)