Meta string is not designed for encoding arbitrary strings, they are used to encode limited enumerated string only, such as classname/fieldname/packagename/nam

Meta string is not designed for encoding arbitrary strings, they are used to encode limited enumerated string only, such as classname/fieldname/packagename/namespace/path/modulename. This is why we name it as meta string, used in a case where lossless statistical compresion can't provide a gain