BatchMessageIdImpl can be compared to MessageIdImpl #1285
Merged
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A batch message id is a MessageIdImpl with a batchIndex >=
0. Therefore, they can be compared to MessageIdImpl. If all fields
other than the batchIndex are equal to a messageId, the
BatchMessageIdImpl can compare its batchIndex with -1. If it is -1, it
matches the MessageIdImpl. If it is greater than -1, then it is
greater than the MessageIdImpl.