/**
 * Memoizes the provided three-argument function.
 *
 * @internal
 */
export declare function memoize3<A1 extends object, A2 extends object, A3 extends object, R>(fn: (a1: A1, a2: A2, a3: A3) => R): (a1: A1, a2: A2, a3: A3) => R;