@Override
  public Map<MessageType, Command> get(final KnownVersion version) {
    return unmodifiableRegisteredCommands.get(version);
  }
Gets the command map for a given version.

@param version of command map to return.

@return immutable {@link Map} for {@link MessageType} to {@link Command}.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/CommandInitializer.java