     let leftConstraint = tgViewController.view.leftAnchor.constraint(equalTo: view.leftAnchor)
     let rightConstraint = tgViewController.view.rightAnchor.constraint(equalTo: view.rightAnchor)
     let topConstraint = tgViewController.view.topAnchor.constraint(equalTo: view.topAnchor)
-    let bottomConstraint = tgViewController.view.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -tabBarHeight)
+    let bottomConstraint = tgViewController.view.bottomAnchor.constraint(equalTo: view.bottomAnchor)
     NSLayoutConstraint.activate([leftConstraint, rightConstraint, topConstraint, bottomConstraint])
 
     tgViewController.didMove(toParentViewController: self)

    return tgViewController.view as! GLKView
  }

  /// The height of our enclosing tab bar controller's tab bar.
  open var tabBarHeight : CGFloat {
    return self.tabBarController?.tabBar.frame.height ?? 0
  }

  /**

    findMeButton.translatesAutoresizingMaskIntoConstraints = false
    mapView.addSubview(findMeButton)

    let bottomOffset = -Dimensions.defaultPadding - tabBarOffset
    let horizontalConstraint = findMeButton.rightAnchor.constraint(equalTo: mapView.rightAnchor, constant: -Dimensions.defaultPadding)
    let verticalConstraint = findMeButton.bottomAnchor.constraint(equalTo: mapView.bottomAnchor, constant: bottomOffset)
    let widthConstraint = findMeButton.widthAnchor.constraint(equalToConstant: Dimensions.squareMapBtnSize)
    let heightConstraint = findMeButton.widthAnchor.constraint(equalToConstant: Dimensions.squareMapBtnSize)
    NSLayoutConstraint.activate([horizontalConstraint, verticalConstraint, widthConstraint, heightConstraint])
