export default class UtilityService {
    static setCookie: (name: string, val: string, validMilliSeconds?: number) => void;
    static getCookie: (name: string) => string | undefined;
    static deleteCookie: (name: string) => void;
    static formatDate: (date: Date) => string;
    static getMonthsArrayShort: () => string[];
    static getMonthsArrayFullString: () => string[];
    static getMonthShortString: (month: number) => string;
    static getMonthFullString: (month: number) => string;
    static getPastMonthsArrayShort: (num: number) => string[];
    static addMonthsToDate: (date: Date, months: number) => Date;
    static getStartOfTheDay: (date: Date) => Date;
    static getEndOfTheDay: (date: Date) => Date;
    static addDaysToMonth: (date: Date, days: number) => Date;
    static addHoursToDate: (date: Date, hours: number) => Date;
    static addMinutesToDate: (date: Date, minutes: number) => Date;
    static addSecondsToDate: (date: Date, seconds: number) => Date;
    static getFirstDayOfTheMonth: (date: Date) => Date;
    static getLastDayOfTheMonth: (date: Date) => Date;
    static getDaysInMonth: (year: number, month: number) => number;
    static isLeapYear: (year: number) => boolean;
    static generateGUID: () => any;
    static generateTimeString: (date: Date) => string;
    static exportJsonAsExcelSheet: (json: any[], fileTitle: string) => void;
    static LightenDarkenColor: (col: string, amt: number) => string;
    static getProfilePictureUrl: (siteUrl: string, email: string, apiType?: string, size?: string) => string;
    static getRandomColorCode: () => string;
    static transparentize(value: string, opacity: number): string;
}