The static registry is an instance of the class
If you want to add functionality to the registry, you should
create a class that extends
specify this class to instantiate for the singleton in the static registry.
Use the static method
setClassName() to specify
The class must be a subclass of
Example 693. Example of Specifying the Singleton Registry's Class Name
The registry throws a
Zend_Exception if you attempt to set the
classname after the registry has been accessed for the first time.
It is therefore recommended that you specify the class name for your
static registry in your application bootstrap.