A set of messages. A message set has a fixed serialized form, though the container
for the bytes could be either in-memory or on disk. A The format of each message is
as follows:
4 byte size containing an integer N
N message bytes as described in the message class
A set of messages. A message set has a fixed serialized form, though the container for the bytes could be either in-memory or on disk. A The format of each message is as follows: 4 byte size containing an integer N N message bytes as described in the message class