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=== tests/cases/conformance/types/primitives/boolean/extendBooleanInterface.ts ===
interface Boolean {
doStuff(): string;
>doStuff : () => string
doOtherStuff<T>(x: T): T;
>doOtherStuff : <T>(x: T) => T
>x : T
}
var x = true;
>x : boolean
>true : true
var a: string = x.doStuff();
>a : string
>x.doStuff() : string
>x.doStuff : () => string
>x : true
>doStuff : () => string
var b: string = x.doOtherStuff('hm');
>b : string
>x.doOtherStuff('hm') : "hm"
>x.doOtherStuff : <T>(x: T) => T
>x : true
>doOtherStuff : <T>(x: T) => T
>'hm' : "hm"
var c: string = x['doStuff']();
>c : string
>x['doStuff']() : string
>x['doStuff'] : () => string
>x : true
>'doStuff' : "doStuff"
var d: string = x['doOtherStuff']('hm');
>d : string
>x['doOtherStuff']('hm') : "hm"
>x['doOtherStuff'] : <T>(x: T) => T
>x : true
>'doOtherStuff' : "doOtherStuff"
>'hm' : "hm"
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