File: deeplyNestedCheck.types

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=== tests/cases/compiler/deeplyNestedCheck.ts ===
// Repro from #14794

interface DataSnapshot<X = {}> {
  child(path: string): DataSnapshot;
>child : (path: string) => DataSnapshot<{}>
>path : string
}

interface Snapshot<T> extends DataSnapshot {
  child<U extends Extract<keyof T, string>>(path: U): Snapshot<T[U]>;
>child : <U extends Extract<keyof T, string>>(path: U) => Snapshot<T[U]>
>path : U
}