Unable to load library when extending a core library

[eluser]musonic[/eluser]
@InsiteFX - I assume you mean that the Input class is auto-loaded. That isn't the issue I'm having. I'm trying to load another library within the Input class.
@pickupman - in the example code I posted, I don't use the superobject. It is currently loaded within the csrf library I'm trying to load. I have tried to use the superobject in order to try to load the csrf library but as I tried to explain in my previous post because the Input class is loaded before the Base5 class the method get_instance() does not yet exist. This is why the code you suggest doesn't work.