public EditReviewPage(string businessId, string businessName)
 {
     InitializeComponent();
     vm             = new EditReviewViewModel(businessId, businessName);
     BindingContext = vm;
     isNew          = true;
 }
        public EditReviewPage(Review review) : base()
        {
            InitializeComponent();

            vm             = new EditReviewViewModel(review);
            BindingContext = vm;
            isNew          = false;
        }