code: func IsBech32SegwitPrefix(prefix string) bool {
  	prefix = strings.ToLower(prefix)
  	_, ok := bech32SegwitPrefixes[prefix]
  	return ok
  }
docs: // IsBech32SegwitPrefix returns whether the prefix is a known prefix for segwit
  // addresses on any default or registered network.  This is used when decoding
  // an address string into a specific address type.