private boolean handleReplyWithOnlyIgnoredErrors(Reply r) {
        if (DocumentProtocol.hasOnlyErrorsOfType(r, DocumentProtocol.ERROR_MESSAGE_IGNORED)) {
            if (ignore == null) {
                ignore = new EmptyReply();
            }
            ignore.addError(r.getError(0));
            return true;
        }
        return false;
    }
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