CoreProxy | Lightweight reverse proxy for Windows | Proxy library

The code you provided is a bit difficult to follow (incomplete and its purpose unclear) so here is a simplified example which will hopefully answer your question. Note that from the question title I'm assuming that the fact that RequestHandlerProxy implements the interface IAdapter is confusing you; that is probably irrelevant (it may be that there are other functions that accept an IAdapter where it would make sense to pass in a RequestHandlerProxy or your own implementation of IAdapter such as adaptImpl below).

I have simplified IAdapter to contain a single function and put everything in one file. To expand this to work in your example you will need to implement all three functions (Adapter_descriptor(),Device_types() & Health()). Code can be run in the go playground (if this does not answer your question perhaps you can modify that code to provide a simplified example of your issue).