/**
 * Valid key in object
 * @param obj
 * @param key
 */
export declare const hasOwn: (obj: any, key: string) => boolean;
/**
 * Is diff two object
 * @param obj1
 * @param obj2
 * @returns {boolean}
 */
export declare const isObjectDiff: (obj1: any, obj2: any) => boolean;
/**
 * Clone deep
 * @param obj
 * @return {*}
 */
export declare const cloneDeep: (obj: any) => any;
/**
 * Remove property from object
 * @param key
 * @param any
 * @param obj
 * @returns {*}
 */
export declare const omit: (key: string, { [key]: _, ...obj }: {
    [x: string]: any;
}) => any;
export declare const extend: {
    <T extends {}, U>(target: T, source: U): T & U;
    <T_1 extends {}, U_1, V>(target: T_1, source1: U_1, source2: V): T_1 & U_1 & V;
    <T_2 extends {}, U_2, V_1, W>(target: T_2, source1: U_2, source2: V_1, source3: W): T_2 & U_2 & V_1 & W;
    (target: object, ...sources: any[]): any;
};