internal static void ReadFromDisk(PDFDocument_ThreadUnsafe pdf_document, PDFInkList inks, Dictionary <string, byte[]> library_items_inks_cache)
        {
            try
            {
                byte[] inks_data = null;
                if (null != library_items_inks_cache)
                {
                    library_items_inks_cache.TryGetValue(pdf_document.Fingerprint, out inks_data);
                }
                else
                {
                    List <LibraryDB.LibraryItem> library_items = pdf_document.Library.LibraryDB.GetLibraryItems(pdf_document.Fingerprint, PDFDocumentFileLocations.INKS);
                    if (0 < library_items.Count)
                    {
                        inks_data = library_items[0].data;
                    }
                }


                if (null != inks_data)
                {
                    Dictionary <int, byte[]> page_ink_blobs = SerializeFile.ProtoLoadFromByteArray <Dictionary <int, byte[]> >(inks_data);

                    if (null != page_ink_blobs)
                    {
                        foreach (var pair in page_ink_blobs)
                        {
                            inks.AddPageInkBlob(pair.Key, pair.Value);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                Logging.Error(ex, "There was a problem loading the Inks for document {0}", pdf_document.Fingerprint);
            }
        }
        private static List <PDFHighlight> ReadFromStream_PROTOBUF(byte[] data)
        {
            List <PDFHighlight> highlights_list = SerializeFile.ProtoLoadFromByteArray <List <PDFHighlight> >(data);

            return(highlights_list);
        }