post method
- FakePerson author,
- String threadId,
- String text
Posts text as author into threadId through the write path of the world (as if the
author's client sent it) and returns the stored message.
Implementation
JsonMap post(FakePerson author, String threadId, String text) =>
world.createMessage(author.id, threadId, {
'client_msg_id': world.nextId(),
'content_md': text,
}).message;