Inheritance: Rg.Plugins.Popup.Pages.PopupPage
 private async void OnOpenSystemOffsetPage(object sender, EventArgs e)
 {
     var page = new SystemOffsetPage();
     await Navigation.PushPopupAsync(page);
 }
 private async void OnOpenSystemOffsetPage(object sender, EventArgs e)
 {
     var page = new SystemOffsetPage();
     await Navigation.PushPopupAsync(page);
 }