private void radioShowFileTree_Checked(object sender, RoutedEventArgs e)
        {
            this.fileTree.Visibility  = Visibility.Visible;
            this.patchList.Visibility = Visibility.Collapsed;
            ClearEditor();

            if (this._tracker != null && this.fileTree.ItemsSource == null)
            {
                var repositoryGraph = _tracker.RepositoryGraph;
                if (repositoryGraph != null)
                {
                    this.fileTree.ItemsSource = _tracker.GetChangedFilesForCommit(commitId2);
                }
                //repositoryGraph.GetTree(commitId2).Children;
            }
        }