A recommendation was made to have a method available that allows a callback to be responsible for the creation of a specific class. This could technically be done by a service provider in the service-management library, however, that's better suited for a type of class (has interface, has attribute, etc) but is heavy impact performance-wise if it needs to iterate through multiple theoretical nested loops just to find the specific class name.

'delegate' would instruct the DI to use the provided callback for the instantiating of a class, which would pass class name, parameters and instance of the $DI as parameters