code: synchronized HttpRequest startRequest(HttpRequest request) {
  		if (request == null) {
  			throw new IllegalArgumentException("Request is null");
  		}
  
  		if (requestInjector != null) {
  			request.setInjector(requestInjector);
  		}
  
  		registerRequest(request);
  		dispatchRequest(request);
  		notifyRequestStarted(request);
  
  		return request;
  	}
docs: Starts network request on the network queue (method returns immediately)