export declare class Utils {
    /**
     * https://stackoverflow.com/questions/1960473/unique-values-in-an-array
     * @param arr
     * @returns {any[]}
     */
    static unique_array(arr: any[]): any[];
    static escapeRegExp(text: string): string;
    static clone(obj: any): any;
    static uniqArr(res: any[]): any[];
    static merge(...args: any[]): any;
    static get(arr: any, path?: string): any;
    static splitTyped(arr: string, sep?: string): any[];
    static set(arr: any, path: string | any[], value: any): boolean;
    static isArray(o: any): o is any[];
    static isObject(o: any): o is object;
    static isString(o: any): o is string;
    static isEmpty(o: any): boolean;
}