export declare const isEqual: (left: string, right: string) => boolean;
export declare const isLess: (left: string, right: string) => boolean;
export declare const isLessOrEqual: (left: string, right: string) => boolean;
export declare const isGreater: (left: string, right: string) => boolean;
export declare const isGreaterOrEqual: (left: string, right: string) => boolean;
export declare const isBetween: (between: string, left?: string, right?: string) => boolean;
