         performSegue(withIdentifier: SegueIdentifiers.trendsToHa1cTrend,
                      sender: self)
     }
-
-    // MARK: - Navigation
 
     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
 

        configureHa1cViewGesture()
    }

    func configureReadings() {
        // reference TrendsContainerViewController
        let trendsAlgorithmModel = TrendsAlgorithmModel.sharedInstance() as! TrendsAlgorithmModel

        }
    }

    // MARK: - configure gestures

    func configureBloodGlucoseViewGesture() {
        let bloodGlucoseTapGesture = UITapGestureRecognizer(target: self,
                                                            action: #selector(bloodGlucoseViewTapped(_:)))
        bloodGlucoseView.addGestureRecognizer(bloodGlucoseTapGesture)
    }

    func configureHa1cViewGesture() {
        let ha1cTapGesture = UITapGestureRecognizer(target: self,
                                                    action: #selector(ha1cViewTapped(_:)))
        ha1cView.addGestureRecognizer(ha1cTapGesture)
    }

    // MARK: - Navigation

    func bloodGlucoseViewTapped(_ sender: UITapGestureRecognizer) {
        performSegue(withIdentifier: SegueIdentifiers.trendsToBloodGlucoseTrend,
                     sender: self)
