immutable-path/dist/util/has.d.ts

Immutable `get`, `set`, `has`, `unset` deep path operations libraray for object, array and `Map`.

import { Source, Key } from "./types";
/**
 * Returns whether given key/index exists in given object/array/Map exists.
 * Returns true even for `undefined` values if key/index exists.
 *
 * @ignore
 * @param source is the source get value from.
 * @param key is the key/index get value of.
 * @returns value of given index/key.
 */
export default function _has<S extends Source, K extends Key<S>>(source: S, key: K): boolean;
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