Ability to extend interfaces optionally

[normalser]

Code

Would it be possible to have such ability in TS ?

interface A {
    a: string
}

interface B {
    b: string
}

// notice: B?
interface C extends A, B? {
    c: string
}

// where C would be of type: {a:string, b?:string, c:string}

[kitsonk]

Related to #563 (partials) and dupe of #371.

[normalser]

wow, old one, thanks :)