[aerogear-dev] Make id configurable

Hey Guys, I'm working on AEROGEAR-565 to make id configurable. I've been taking a look at the JS and iOS and apis are very similar, both are getting a configuration parameter with the name of the field that represents the id. I like to see libraries close to but I don't know if this the best approach for the android. I'm in doubt in what would be the best solution (for android) * Configuration # Pros It requires no change in entity/model # Cons Use reflections * Interfaces # Pros Typed paras # Cons Requires implement on entity/model * Annotation # Pros Clean configuration # Cons Use Scan/Reflection Anyone have any thoughts or see any other solution?