declare function randomString(length: number, config?: {
    includeSpecialCase: boolean;
}): string;
declare const filter: {
    alphabetOnly(word: string): string;
    alphaNumeric(word: string): string;
    numericOnly(word: string): string;
};
declare const validate: {
    email(input: string): RegExpMatchArray | null;
};
export { filter, validate, randomString };