start method
Implementation
void start({required String serverUrl}) {
assert(serverUrl.startsWith('ws:') || serverUrl.startsWith('wss:'));
if(serverUrl.contains('192.168.') && !serverUrl.contains(':')) {
throw 'Please, inform the port on the serverUrl, default is 3000, example: ws://192.168.0.8:3000';
}
_serverUrl = serverUrl;
_initialized = true;
_connect();
}