modificationDate property
      
      DateTime
      get
      modificationDate
      
    
    
Gets the modification date of the PDF document
Implementation
DateTime get modificationDate {
  if (_helper._dictionary!.containsKey(
        PdfDictionaryProperties.modificationDate,
      ) &&
      _helper._dictionary![PdfDictionaryProperties.modificationDate]
          is PdfString) {
    return _helper.modificationDate = _helper._dictionary!.getDateTime(
      _helper._dictionary![PdfDictionaryProperties.modificationDate]!
          as PdfString,
    );
  }
  return _helper.modificationDate = DateTime.now();
}
      
      set
      modificationDate
      (DateTime value) 
      
    
    
Sets the modification date of the PDF document
Implementation
set modificationDate(DateTime value) {
  _helper.modificationDate = value;
  _helper._dictionary!.setDateTime(
    PdfDictionaryProperties.modificationDate,
    _helper.modificationDate,
  );
}