private void SearchBar_TextChanged(object sender, TextChangedEventArgs e)
 {
     if (string.IsNullOrWhiteSpace(e.NewTextValue))
     {
         _campaignsViewModel.Initialize(_adminCustomerData);
     }
 }
 public CampaignsPage(AdminCustomerData adminCustomerData)
 {
     NavigationPage.SetBackButtonTitle(this, "");
     InitializeComponent();
     _adminCustomerData = adminCustomerData;
     BindingContext     = _campaignsViewModel = new CampaignsViewModel(Navigation);
     _campaignsViewModel.Initialize(_adminCustomerData);
 }