import { Indexer } from './types';
export declare const isPrimitive: (x: any) => boolean;
declare type MergeDeep = <L extends Indexer, R extends Indexer>(left: L, right: R) => L & R;
export declare const mergeDeep: MergeDeep;
export declare const isPromise: <T>(x: T | Promise<T>) => x is Promise<T>;
export declare const reduceObj: <T, R>(fn: (acc: R, t: T, key: string) => R, initial: R, obj: Indexer<T>) => R;
export declare const mapObj: <T, R>(fn: (t: T, key: string) => R, obj: Indexer<T>) => Indexer<R>;
export {};