public override Primitives.VisualItem Create( Primitives.Path source )
{
Primitives.Container container = new Primitives.Container( _offset );
Primitives.Path shadow = (Primitives.Path) source.Copy();
shadow.Pen = null;
shadow.Brush = new Paint.Brushes.SolidBrush( _color );
container.AddBack( shadow );
return container;
}