sendMessage method
Implementation
Future<rtpb.ChannelMessageAck> sendMessage({
required String channelId,
required Map<String, String> content,
}) =>
_send<rtpb.ChannelMessageAck>(rtpb.Envelope(
channelMessageSend: rtpb.ChannelMessageSend(
channelId: channelId,
content: jsonEncode(content),
)));