import { type Nullable, type NotNull } from './nullable.js';
/**
 *  Zips _self_ with another `Nullable<T>`.
 *  If _self_ is `T` and _other_ is `U`, this method returns `[NotNull<T>, NotNull<U>]`.
 *  Otherwise, `null` is returned.
 */
export declare function zipForNullable<T, U>(self: Nullable<T>, other: Nullable<U>): Nullable<[NotNull<T>, NotNull<U>]>;