endTyping method
Sends end typing event.
Implementation
void endTyping() {
sbLog.i(StackTrace.current);
final now = DateTime.now().millisecondsSinceEpoch;
if (now - _lastEndTypingTimestamp >
chat.chatContext.options.typingIndicatorThrottle) {
final cmd = Command.buildEndTyping(channelUrl, now);
chat.commandManager.sendCommand(cmd);
_lastStartTypingTimestamp = 0;
_lastEndTypingTimestamp = now;
}
}