File: nullishCoalescingOperator10.types

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=== tests/cases/conformance/expressions/nullishCoalescingOperator/nullishCoalescingOperator10.ts ===
declare function f(): string | undefined;
>f : () => string | undefined

let gg = f() ?? 'foo'
>gg : string
>f() ?? 'foo' : string
>f() : string | undefined
>f : () => string | undefined
>'foo' : "foo"