private async void buttonRefreshButton_Click(object sender, TextChangedEventArgs e)
{
vm = new ViewModels.DodawaniePiwaViewModel();
BindingContext = vm;
InitializeComponent();
}
public OknoDodawaniaPiwa()
{
vm = new ViewModels.DodawaniePiwaViewModel();
BindingContext = vm;
InitializeComponent();
}