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=== tests/cases/compiler/iteratorsAndStrictNullChecks.ts ===
// for..of
for (const x of ["a", "b"]) {
>x : Symbol(x, Decl(iteratorsAndStrictNullChecks.ts, 1, 10))
x.substring;
>x.substring : Symbol(String.substring, Decl(lib.es5.d.ts, --, --))
>x : Symbol(x, Decl(iteratorsAndStrictNullChecks.ts, 1, 10))
>substring : Symbol(String.substring, Decl(lib.es5.d.ts, --, --))
}
// Spread
const xs = [1, 2, 3];
>xs : Symbol(xs, Decl(iteratorsAndStrictNullChecks.ts, 6, 5))
const ys = [4, 5];
>ys : Symbol(ys, Decl(iteratorsAndStrictNullChecks.ts, 7, 5))
xs.push(...ys);
>xs.push : Symbol(Array.push, Decl(lib.es5.d.ts, --, --))
>xs : Symbol(xs, Decl(iteratorsAndStrictNullChecks.ts, 6, 5))
>push : Symbol(Array.push, Decl(lib.es5.d.ts, --, --))
>ys : Symbol(ys, Decl(iteratorsAndStrictNullChecks.ts, 7, 5))
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