Kind of the other way round. If you have code that has a function named `dispose`, it will keep on working just fine, nothing needs to be renamed (not now, and

Kind of the other way round. If you have code that has a function named `dispose`, it will keep on working just fine, nothing needs to be renamed (not now, and not in the future when you want to start using `using`). The symbol `Symbol.dispose` is special, unlike any normal string or identifier, because it didn't exist until the new standard, so existing code can't have been using it. This guarantees a level of backwards compatibility that wouldn't exist otherwise.