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Class com.itextpdf.pdfua.checkers.PdfUA1Checker

The superclass changed from java.lang.Object to com.itextpdf.pdfua.checkers.PdfUAChecker.
Removed interface com.itextpdf.kernel.validation.IValidationChecker.
Documentation changed from old to new.

Changed Methods
void  checkMetadata( PdfCatalog) Documentation changed from old to new.
Checks that the {@code Catalog} dictionary of a conforming file (the version number of a file may be any value from 1.0 to 1.7) contains the {@code Metadata} key whose value is a metadata stream.
void  warnOnPageFlush() Method was locally defined, but is now inherited from PdfUAChecker. Logs a warn on page flushing that page flushing is disabled in PDF/UA mode.