Typescript: QuestionToken is not removed from method declaration emit

[ajafff]

TypeScript Version: 3.7.2

Search Terms:

Code

// @target: es6
class Base {
    method?() { }
}

Expected behavior:

"use strict";
class Base {
    method() { }
}

Actual behavior:

"use strict";
class Base {
    method?() { }
}

Playground Link: http://www.typescriptlang.org/play/?target=2&ssl=3&ssc=2&pln=1&pc=1#code/MYGwhgzhAEBCkFNoG8BQ0PQLYIC4AsB7AEwH4AKAShWgF9V6g

[RyanCavanaugh]

Somehow this isn't a regression?!?!?!?

[AnyhowStep]

As far back as 2.4.1!
Holy shit!

I've never considered writing such a construct before...

Every time I've needed an "optional method", I would use,

class Base {
    method? : () => T
}