public static void ScrollToAvalonEdit(this ScrollViewer scrollViewer, TextArea textArea, int line, int column)
 {
     scrollViewer.ScrollToAvalonEdit(textArea, line, column, VisualYPosition.LineMiddle, (scrollViewer != null) ? (scrollViewer.ViewportHeight / 2.0) : 0.0, 0.3);
 }
 public static void ScrollToAvalonEdit(this ScrollViewer scrollViewer, TextArea textArea, int line)
 {
     scrollViewer.ScrollToAvalonEdit(textArea, line, -1);
 }