code: func ToIntsRef(input []byte, scratch *util.IntsRefBuilder) *util.IntsRef {
  	scratch.Clear()
  	for _, v := range input {
  		scratch.Append(int(v))
  	}
  	return scratch.Get()
  }
docs: // fst/Util.java
  /* Just takes unsigned byte values from the BytesRef and converts into an IntsRef. */