public void Submit(
ChatMessageId id,
Sender sender,
MessageContents contents,
Instant time,
ChannelId channel
) =>
Then(new MessageSubmitted(id, sender, contents, time, channel));
public void Edit(Sender sender, MessageContents newContents,
Instant time) =>
Then(new MessageEdited(sender, newContents, time, _channelId, Id));
