export declare const isLocalStorageAvailable: () => boolean;
export declare const throwIfLocalStorageUnavailable: () => void;
/**
 * Returns a pseudo-random uuid.
 */
export declare const generateUuid: () => string;
/**
 * Returns a random letter ranging from a to z.
 * @param isUpperCase (default true) Determines whether the random letter should be upper case.
 */
export declare const getRandomLetter: (isUpperCase?: boolean) => string;
export declare const getRandomInteger: (maxInteger: number) => number;