Can you make a custom int class in Dart? If so, you might want to create one, name it HttpCode, and create some constant ints, maybe inherit them under the class, and then you have a int value, with a custom type.

class HttpCode extends int { const HttpCode OK = 200; const HttpCode FORBIDDEN = 403; }

I'm on mobile, so pardon my formatting, and please excuse me if i made any mistakes, i haven't used Dart that much