AbstractString::reverse() methodAbstractString::width() follow POSIX.1-2001LazyString which provides memoizing stringable objects@experimental anymores() helper method to get either an UnicodeString or ByteString instance,
depending of the input string UTF-8 compliancy$cut parameter to Symfony\Component\String\AbstractString::truncate()AbstractString::containsAny()ByteString::fromRandom()