public PdfReport Sign(Action<SignedFileBuilder> pdfRptSignedFileBuilder)
{
var builder = new SignedFileBuilder(this);
pdfRptSignedFileBuilder(builder);
if (DataBuilder.DocumentSecurity == null)
DataBuilder.DocumentSecurity = new DocumentSecurity();
DataBuilder.DocumentSecurity.DigitalSignature = builder.DigitalSignature;
return this;
}