MarshalText
method MarshalText: tuple of (text: Slice<Byte>, err: error)
(Slice<Byte>text, error err) MarshalText()
func MarshalText() -> (Slice<Byte>, error)
func MarshalText() tuple of (|name=text| Slice<Byte>, |name=err| error)
Function MarshalText() As Tuple (Of Slice<Byte>, error)