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=== tests/cases/compiler/getParameterNameAtPosition.ts ===
// Repro from #30171
interface Mock<Y extends any[]> extends Function {
(...args: Y): any;
>args : Y
}
type Tester = (opts: any, done: (...args: any[]) => any) => any;
>Tester : (opts: any, done: (...args: any[]) => any) => any
>opts : any
>done : (...args: any[]) => any
>args : any[]
declare function cases(tester: Tester): void;
>cases : (tester: Tester) => void
>tester : Tester
declare function fn<Y extends any[]>(implementation?: (...args: Y) => any): Mock<Y>;
>fn : <Y extends any[]>(implementation?: ((...args: Y) => any) | undefined) => Mock<Y>
>implementation : ((...args: Y) => any) | undefined
>args : Y
cases(fn(opts => { }));
>cases(fn(opts => { })) : void
>cases : (tester: Tester) => void
>fn(opts => { }) : Mock<[opts: any]>
>fn : <Y extends any[]>(implementation?: ((...args: Y) => any) | undefined) => Mock<Y>
>opts => { } : (opts: any) => void
>opts : any
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