So we got a bit more information: 
"The original
          files in question were authored by a person who cannot be
          traced
        and we have some indication [1] determining applicable
            license may not be
        possible."
        
        
          
        Reading that link (which appears to be scraped from a
          mailing list in order to show ads) shows a search for Nobuo
          Tamemasa not being successful.
        
        
        A bit more research makes it look like Nobuo placed code
          examples on 
www.codeguru.com 
        
        
        
          
        
           * This class (and also SortButtonRenderer) is based
              on original code by Nobuo Tamemasa (version
          
         
        
        
        Feedback from the internet indicates the code is "open
          source" but does not really have a license and thus is open
          only in the sense you can read it, not in the sense you can
          add it to your own software.
        
        
        
        
        
        
        The best example is from a site that gathered up Nobuo's
          examples since they have become "hard to find" on the
          internet.
        
        
        
        
        
        
        I am going to feed this bit of research back to the CQ
          ticket. But I am not really sure if I am helping or hindering,
          I would prefer to talk to the JCommon team and see if they
          have a bead on this stuff.
        
        
        Jody