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=== tests/cases/conformance/types/thisType/thisTypeOptionalCall.ts ===
function maybeBind<T, A extends any[], R>(obj: T, fn: ((this: T, ...args: A) => R) | undefined): ((...args: A) => R) | undefined {
>maybeBind : Symbol(maybeBind, Decl(thisTypeOptionalCall.ts, 0, 0))
>T : Symbol(T, Decl(thisTypeOptionalCall.ts, 0, 19))
>A : Symbol(A, Decl(thisTypeOptionalCall.ts, 0, 21))
>R : Symbol(R, Decl(thisTypeOptionalCall.ts, 0, 38))
>obj : Symbol(obj, Decl(thisTypeOptionalCall.ts, 0, 42))
>T : Symbol(T, Decl(thisTypeOptionalCall.ts, 0, 19))
>fn : Symbol(fn, Decl(thisTypeOptionalCall.ts, 0, 49))
>this : Symbol(this, Decl(thisTypeOptionalCall.ts, 0, 56))
>T : Symbol(T, Decl(thisTypeOptionalCall.ts, 0, 19))
>args : Symbol(args, Decl(thisTypeOptionalCall.ts, 0, 64))
>A : Symbol(A, Decl(thisTypeOptionalCall.ts, 0, 21))
>R : Symbol(R, Decl(thisTypeOptionalCall.ts, 0, 38))
>args : Symbol(args, Decl(thisTypeOptionalCall.ts, 0, 99))
>A : Symbol(A, Decl(thisTypeOptionalCall.ts, 0, 21))
>R : Symbol(R, Decl(thisTypeOptionalCall.ts, 0, 38))
return fn?.bind(obj);
>fn?.bind : Symbol(Function.bind, Decl(lib.es5.d.ts, --, --))
>fn : Symbol(fn, Decl(thisTypeOptionalCall.ts, 0, 49))
>bind : Symbol(Function.bind, Decl(lib.es5.d.ts, --, --))
>obj : Symbol(obj, Decl(thisTypeOptionalCall.ts, 0, 42))
}
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