private bool CanExecute()
{
return(_source.CanGoBack(_steps));
}
/// <summary>
/// Determines if view model can navigate back.
/// </summary>
/// <param name="steps">The number of steps to make.</param>
/// <returns>True if view model can navigate back.</returns>
public bool CanGoBack(int steps = 1)
{
return(_source.CanGoBack(steps));
}