public bool ReplaceText(VisualStudio.Text.Span replaceSpan, string text)
 {
     throw new NotImplementedException();
 }
 public ITrackingSpan CreateTrackingSpan(VisualStudio.Text.Span span, SpanTrackingMode trackingMode, TrackingFidelityMode trackingFidelity) => throw new NotImplementedException();
 public void Write(TextWriter writer, VisualStudio.Text.Span span) => throw new NotImplementedException();
 public ITrackingSpan CreateCustomTrackingSpan(VisualStudio.Text.Span span, TrackingFidelityMode trackingFidelity, object customState, CustomTrackToVersion behavior) => throw new NotImplementedException();
 public string GetText(VisualStudio.Text.Span span) => throw new NotImplementedException();