/// <summary>
        /// Adds a PdfScriptObject to the page that draws a circle.
        /// </summary>
        public static PdfObjectRef DrawCircle(this PdfPageWriter page, double x, double y, double ray, PdfGraphicsOptions options)
        {
            var obj = new PdfScriptObject();

            obj.BeginGraphicsState();
            options.Apply(obj);
            obj.DrawCircle(x, y, ray);
            obj.EndPath(true, true, true);
            obj.EndGraphicsState();
            return(page.WriteObject(obj));
        }