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ReadonlyDeep type

Like Readonly but recursive

Signature:

export declare type ReadonlyDeep<T> = T extends Builtin
? T
: T extends Map<infer K, infer V>
? ReadonlyMap<ReadonlyDeep<K>, ReadonlyDeep<V>>
: T extends ReadonlyMap<infer K, infer V>
? ReadonlyMap<ReadonlyDeep<K>, ReadonlyDeep<V>>
: T extends WeakMap<infer K, infer V>
? WeakMap<ReadonlyDeep<K>, ReadonlyDeep<V>>
: T extends Set<infer U>
? ReadonlySet<ReadonlyDeep<U>>
: T extends ReadonlySet<infer U>
? ReadonlySet<ReadonlyDeep<U>>
: T extends WeakSet<infer U>
? WeakSet<ReadonlyDeep<U>>
: T extends Promise<infer U>
? Promise<ReadonlyDeep<U>>
: T extends {}
? {
    readonly [K in keyof T]: ReadonlyDeep<T[K]>;
}
: Readonly<T>;

References: ReadonlyDeep

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