import { NormalObject } from '@vunk/core/shared/types';
export declare function isObject(object: any): boolean;
export declare function isPlainObject(obj: any): boolean;
export declare function isEmptyObject(obj: object): boolean;
export declare function isNotEmptyObject(obj: object): boolean;
/**
 * 从对象中提取指定的属性
 * @param data  数据
 * @param opts
 * @param opts.excludes 排除的属性
 * @param opts.includes 包含的属性
 * @returns 返回一个新的对象
 */
export declare const pickObject: <T extends NormalObject, EX extends (keyof T)[], KI extends keyof T>(data: T, opts?: {
    excludes?: EX;
    includes?: KI[];
}) => { [P in EX extends (infer KE)[] ? Exclude<KI, KE> : KI]: T[P]; };
/**
 * Same as `Object.assign()` but with type inference
 * @param obj  The object to assign to
 * @param objAddendum  The object to assign from
 */
export declare function objectAssign<Obj extends object, ObjAddendum>(obj: Obj, objAddendum: ObjAddendum): asserts obj is Obj & ObjAddendum;