https://help.syncfusion.com/cr/aspnetmvc-js2/Syncfusion.EJ2.PdfViewer.PdfViewerCustomStampBuilder.html
Class PdfViewerCustomStampBuilder - ASP.NETMVC-EJ2 API Reference | Syncfusion
Class PdfViewerCustomStampBuilder - ASP.NETMVC-EJ2 API Reference
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