private static void prepareAttachments(List<AttachmentFile> results, PdfReader reader)
{
var documentLevelFiles = extractDocumentLevelAttachments(reader);
if (documentLevelFiles != null && documentLevelFiles.Any())
results.AddRange(documentLevelFiles);
var fileAttachmentAnnotations = extractFileAttachmentAnnotations(reader);
if (fileAttachmentAnnotations != null && fileAttachmentAnnotations.Any())
results.AddRange(fileAttachmentAnnotations);
}