Here is a list of all files with brief descriptions:

array-functions.php
ArrayList.php
Collection.php
Date.php
Email.php
file-functions.php
File.php
FileUloader.php
Image.php
IndexNotNummericException.php
IndexOutOfBoundsException.php
ListCollection.php
Locale.php
NotImplementedException.php
object-functions.php
OrderedSet.php
Password.php
PhoneNumber.php
SetCollection.php
Slug.php
string-functions.php