export declare function capitalize(str: string): string;
export declare function substitute(str: string | Function, obj: {
    [x: string]: any;
}): any;
export declare function removeProtocol(url: string): string;
export declare function getRTLPosition(position: string): string;
export declare function getDirectionIconName(mode?: string, double?: boolean): "ArrowRightDouble" | "AngleRight" | "ArrowLeftDouble" | "AngleLeft";