code: func Fuzz(data []byte) int {
  	if len(data) == 0 {
  		return -1
  	}
  	if data[0]%2 == 0 {
  		return fuzzEncode(data[1:])
  	}
  	return fuzzDecode(data[1:])
  }
docs: // Fuzz implements a go-fuzz fuzzer method to test various encoding method
  // invocations.