Understanding Renode internal code base

[asmitaj08]

Hi,
I am trying to understand renode code base. I have been looking into it since last couple of days (parallely learning c# on the way, so it's kinda a bit difficult for me).
I have a query regarding it. Any help would be highly appreciated. Thank you!!
Query :
When we start the emulation, I believe, it's inside ExternalsManager.Start() , which internally looks for IHasOwnLife interface types and performs external.Resume(); or target.Resume(); or external.Start(); , target.Start(); depending on condition which is met. But I can't figure out where are these Resume() or Start() method actually defined, like where are they actually loading the binary and starting the execution.