In order to add a loading indicator over specific views in a rather transparent way, I had to add a parameter to the send request, a parameter to identify which presenter made the call, so that a dedicated filter can manage the requests and the corresponding responses, notifying the concerned presenters / views.
In short, I wanted to add a parameter to the call that will not be sent to the server but that will be found in the Method's data hash.
I made a notation for these parameters: @MethodDataParam, with a key as annotation parameter.
It seems generic enough to be worth being part of the project. I added a documentation and a test case.
Pull request to follow...