@FunctionalInterface public interface FeedStatusCallback<T extends EFeed>
ERequestoris not required to override the matching feed status method (
EPublisher.publishStatus(EFeedState, EPublishFeed), or
ERequestor.feedStatus(EFeedState, ERequestFeed)). Instead, a lambda expression implementing this interface may be used as the callback. This allows for tighter coupling between the status callback and the code for handling the callback.
Note: This must be done after opening a feed and before advertising or subscribing.