type protobuf.Varint = ℕ ~ <PosInt 128 LittleEndian> ~ <Seq~MsbCont <Digit 128> ~ ℤ_128 ~ native.UInt8> ;
type protobuf.String = <Seq Char ~ Unicode> ~ UTF-8 ~ <Seq ~ <LengthPrefix protobuf.Varint> Byte> ;