Ok... that is starting to clear out. However, my next question will be, what should be in "_this" parameter for the "ConverterRetrieveServiceContent" method? It need to be a reference to itself (ConverterServiceInstance) and this class is not property of anything...
Sorry if I'm bit of annoying, but I have never used such references before and this line "A reference to the some_object used to make the method call." really confuses me.