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=== tests/cases/compiler/deeplyNestedCheck.ts ===
// Repro from #14794
interface DataSnapshot<X = {}> {
>DataSnapshot : Symbol(DataSnapshot, Decl(deeplyNestedCheck.ts, 0, 0))
>X : Symbol(X, Decl(deeplyNestedCheck.ts, 2, 23))
child(path: string): DataSnapshot;
>child : Symbol(DataSnapshot.child, Decl(deeplyNestedCheck.ts, 2, 32))
>path : Symbol(path, Decl(deeplyNestedCheck.ts, 3, 8))
>DataSnapshot : Symbol(DataSnapshot, Decl(deeplyNestedCheck.ts, 0, 0))
}
interface Snapshot<T> extends DataSnapshot {
>Snapshot : Symbol(Snapshot, Decl(deeplyNestedCheck.ts, 4, 1))
>T : Symbol(T, Decl(deeplyNestedCheck.ts, 6, 19))
>DataSnapshot : Symbol(DataSnapshot, Decl(deeplyNestedCheck.ts, 0, 0))
child<U extends Extract<keyof T, string>>(path: U): Snapshot<T[U]>;
>child : Symbol(Snapshot.child, Decl(deeplyNestedCheck.ts, 6, 44))
>U : Symbol(U, Decl(deeplyNestedCheck.ts, 7, 8))
>Extract : Symbol(Extract, Decl(lib.es5.d.ts, --, --))
>T : Symbol(T, Decl(deeplyNestedCheck.ts, 6, 19))
>path : Symbol(path, Decl(deeplyNestedCheck.ts, 7, 44))
>U : Symbol(U, Decl(deeplyNestedCheck.ts, 7, 8))
>Snapshot : Symbol(Snapshot, Decl(deeplyNestedCheck.ts, 4, 1))
>T : Symbol(T, Decl(deeplyNestedCheck.ts, 6, 19))
>U : Symbol(U, Decl(deeplyNestedCheck.ts, 7, 8))
}
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