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apps/OpenSignServer/cloud/parsefunction/pdf/customSignPdf/PDFAbstractReference.js

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+/*
+PDFAbstractReference by Devon Govett used below.
+The class is part of pdfkit. See https://github.com/foliojs/pdfkit
+LICENSE: MIT. Included in this folder.
+Modifications may have been applied for the purposes of node-signpdf.
+*/
+
+/*
+PDFAbstractReference - abstract class for PDF reference
+*/
+
+class PDFAbstractReference {
+    toString() {
+        throw new Error('Must be implemented by subclasses');
+    }
+}
+
+export default PDFAbstractReference;