GitUI.GitViewModel.Refresh C# (CSharp) Метод

        private void Refresh()
        {
            if (NeedRefresh && !NoRefresh)
            {
                double delta = DateTime.Now.Subtract(nextTimeRefresh).TotalMilliseconds;
                if (delta > 200)
                {
                    NoRefresh = true;
                    NeedRefresh = false;
                    timer.Start();
                }
            }
        }

 private void RefreshGraph_Executed(object sender, ExecutedRoutedEventArgs e)
 {
     gitViewModel.Refresh(true);
 }