code: func HashTrytes(t Trytes, rounds ...CurlRounds) (Trytes, error) {
  	c := NewCurl(rounds...)
  	err := c.AbsorbTrytes(t)
  	if err != nil {
  		return "", err
  	}
  	return c.SqueezeTrytes(HashTrinarySize)
  }
docs: // HashTrytes returns the hash of the given trytes.