iTextSharp.text.pdf.PdfReader.PageRefs.GetSinglePage C# (CSharp) Метод

            protected internal PRIndirectReference GetSinglePage(int n) {
                PdfDictionary acc = new PdfDictionary();
                PdfDictionary top = reader.rootPages;
                int baseb = 0;
                while (true) {
                    for (int k = 0; k < pageInhCandidates.Length; ++k) {
                        PdfObject obj = top.Get(pageInhCandidates[k]);
                        if (obj != null)
                            acc.Put(pageInhCandidates[k], obj);
                    }
                    PdfArray kids = (PdfArray)PdfReader.GetPdfObjectRelease(top.Get(PdfName.KIDS));
                    for (ListIterator it = new ListIterator(kids.ArrayList); it.HasNext();) {
                        PRIndirectReference refi = (PRIndirectReference)it.Next();
                        PdfDictionary dic = (PdfDictionary)GetPdfObject(refi);
                        int last = reader.lastXrefPartial;
                        PdfObject count = GetPdfObjectRelease(dic.Get(PdfName.COUNT));
                        reader.lastXrefPartial = last;
                        int acn = 1;
                        if (count != null && count.Type == PdfObject.NUMBER)
                            acn = ((PdfNumber)count).IntValue;
                        if (n < baseb + acn) {
                            if (count == null) {
                                dic.MergeDifferent(acc);
                                return refi;
                            }
                            reader.ReleaseLastXrefPartial();
                            top = dic;
                            break;
                        }
                        reader.ReleaseLastXrefPartial();
                        baseb += acn;
                    }
                }
            }