private void IViewContainer_TabClosed(object sender, Events.TabClosedEventArgs e)
{
TabClosed?.Invoke(this, e);
}
private void FloatingPane_TabClosed(object sender, Events.TabClosedEventArgs e)
{
System.Diagnostics.Trace.Assert(e.UserControl.DataContext is IViewModel);
IFloatingPaneHost.RemoveViewModel(e.UserControl.DataContext as IViewModel);
}