NOTE: the latest version is 4.0.1
The function call hex someBytes gives a hexadecimal view of the contents of someBytes : Bytes.
hex someBytes
someBytes : Bytes
encodeString "Hello" |> hex Just "48656C6C6F" : Maybe String
> encodeString "$20" <3 bytes> : Bytes.Bytes
encodeString "$20$" |> decodeString Just "$20$" : Maybe String