appendEvent method
Appends an event to a given session.
Throws a http.ClientException if there were problems communicating with
the API service. Throws a ServiceException if the API method failed for
any reason.
Implementation
Future<AppendEventResponse> appendEvent(AppendEventRequest request) async {
final url = Uri.https(_host, '/v1beta1/${request.name}:appendEvent');
final response = await _client.post(url, body: request.event);
return AppendEventResponse.fromJson(response);
}