declare const _default: {
    assign: {
        <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;
    };
    isArray: (arg: any) => arg is any[];
    isFunction: (value: any) => boolean;
    forEach: (arr: any[], callback: (a: {
        [key: string]: any;
    }, b: string) => void) => void;
    startsWith: (fullStr: string, startStr: string) => boolean;
    isEmpty: (value: any) => boolean;
    isObject: (value: any) => boolean;
};
export default _default;