private boolean replyIsBetterThanCurrent(Reply r) {
        return resourceWasFound(r) && !resourceWasFound(successReply);
    }
Encapsulated logic for merging replies from 1-n related DocumentProtocol messages.
For internal use only. Not multithread safe.
documentapi/src/main/java/com/yahoo/documentapi/messagebus/protocol/ReplyMerger.java