code: func MustTritsToTrytes(trits Trits) Trytes {
  	trytes, err := TritsToTrytes(trits)
  	if err != nil {
  		panic(err)
  	}
  	return trytes
  }
docs: // MustTritsToTrytes converts a slice of trits into trytes. Panics if len(t)%3!=0