/**
 * Helper functions that have to do with
 * [maps](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map).
 *
 * @module
 */
/**
 * Helper function to get the values in a `Map` that match an arbitrary condition. Similar to the
 * `Array.map` method, but works for maps.
 *
 * This is efficient such that it avoids converting the map values into an array.
 *
 * If you want to perform a filter and a map at the same time on an array, use the `filterMap`
 * helper function instead.
 */
export declare function mapFilter<K, V>(map: ReadonlyMap<K, V>, predicate: (value: V) => boolean): readonly V[];
/**
 * Helper function to find a value in a `Map`. Similar to the `Array.find` method, but works for
 * maps.
 *
 * This is efficient such that it avoids converting the map values into an array.
 *
 * @param map The map to search through.
 * @param predicate Function that tests each value for a condition.
 * @returns The first value that satisfies the predicate, or undefined if no values satisfy.
 */
export declare function mapFind<K, V>(map: ReadonlyMap<K, V>, predicate: (value: V, key: K, map: ReadonlyMap<K, V>) => boolean): V | undefined;
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