||A ClassLoader is an autoloader for class files that can be installed on
the SPL autoload stack. It is a class loader that either loads only classes of a
specific namespace or all namespaces and it is suitable for working together
with other autoloaders in the SPL autoload stack.
||EventArgs is the base class for classes containing event data.
||The EventManager is the central point of Doctrine's event listener system.
Listeners are registered on the manager and events are dispatched through the
||Base class for writing simple lexers, i.e. for creating small DSLs.
||Class to store and retrieve the version of Doctrine