getSingletonClass method
Return the class of the specified singleton pod, if any.
name: The name of the singleton pod to get the class for
Returns the class of the specified singleton pod, or null if not found
Example:
final singletonClass = registry.getSingletonClass('userService');
print('Singleton class: $singletonClass');
Implementation
@protected
Class? getSingletonClass(String name) => _singletonTypes[name];