https://sautinsoft.com/products/pdf/help/net/api-reference/html/F_SautinSoft_Pdf_Objects_PdfName_Default.htm
PdfName.Default Field
pdfnamedefaultfield
https://api.itextpdf.com/iText/java/9.3.0/com/itextpdf/kernel/pdf/PdfName.html
PdfName (iText 9.3.0 API)
declaration: package: com.itextpdf.kernel.pdf, class: PdfName
pdfnameitextapi