- final byte[] groupId = Util.decodeGroupId(ns.getString("group"));
- final Pair<Long, List<SendMessageResult>> results = m.sendQuitGroupMessage(groupId);
- return handleTimestampAndSendMessageResults(results.first(), results.second());
+ final var writer = new PlainTextWriterImpl(System.out);
+
+ final var groupId = Util.decodeGroupId(ns.getString("group"));
+ final var results = m.sendQuitGroupMessage(groupId);
+ return handleTimestampAndSendMessageResults(writer, results.first(), results.second());