code: protected String makeRequest(String endpoint, Parameter... parameters) {
      return makeRequest(endpoint, false, false, null, parameters);
    }
docs: Coordinates the process of executing the API request GET/POST and processing the response we receive from the
  endpoint.
  
  @param endpoint
  Facebook Graph API endpoint.
  @param parameters
  Arbitrary number of parameters to send along to Facebook as part of the API call.
  @return The JSON returned by Facebook for the API call.
  @throws FacebookException
  If an error occurs while making the Facebook API POST or processing the response.