import { OptionalKeys as OOptionalKeys } from '../Object/OptionalKeys';
import { ObjectOf } from './ObjectOf';
import { List } from './List';
/**
 * Get the keys of `L` that are optional
 * @param L
 * @returns [[Key]]
 * @example
 * ```ts
 * ```
 */
export declare type OptionalKeys<L extends List> = OOptionalKeys<ObjectOf<L>>;