iTextSharp.text.pdf.PdfStamperImp.MarkUsed C# (CSharp) Метод

        public void MarkUsed(PdfObject obj)
        {
            if (append && obj != null) {
                PRIndirectReference ref_p = null;
                if (obj.Type == PdfObject.INDIRECT)
                    ref_p = (PRIndirectReference)obj;
                else
                    ref_p = obj.IndRef;
                if (ref_p != null)
                    marked[ref_p.Number] = 1;
            }
        }

 internal static void MergeResources(PdfDictionary result, PdfDictionary source, PdfStamperImp writer) {
     PdfDictionary dic = null;
     PdfDictionary res = null;
     PdfName target = null;
     for (int k = 0; k < mergeTarget.Length; ++k) {
         target = mergeTarget[k];
         PdfDictionary pdfDict = source.GetAsDict(target);
         if ((dic = pdfDict) != null) {
             if ((res = (PdfDictionary)PdfReader.GetPdfObject(result.Get(target), result)) == null) {
                 res = new PdfDictionary();
             }
             res.MergeDifferent(dic);
             result.Put(target, res);
             if (writer != null)
                 writer.MarkUsed(res);
         }
     }
 }