As an iOS developer beginning to work with Android I came across Retrofit. I understand how to implement synchronous requests but am having trouble implementing asynchronous requests with success/failure callbacks. Specifically, the Callback syntax is unclear to me and there are no concrete examples of how to do this on the Retrofit website, the Square blogpost introducing Retrofit, or elsewhere that I've seen. Can someone please post some example code on this? I filed an issue in the Retrofit repo asking that they update the README with this info.
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