type TSanitizer = (s: string) => string; interface ISanitize extends TSanitizer { keepUnicode: TSanitizer; keepSpace: TSanitizer; addFullstop: TSanitizer; addUnderscore: TSanitizer; addDash: TSanitizer; removeNumber: TSanitizer; keepNumber: TSanitizer; } const sanitize: ISanitize; const addFullstop: TSanitizer; const addUnderscore: TSanitizer; const addDash: TSanitizer; const removeSpace: TSanitizer; export { sanitize, addFullstop, addUnderscore, addDash, removeSpace };