Made data handle methods private
Made data handle methods private

willu47/smif,nismod/smif,nismod/smif,nismod/smif,tomalrussell/smif,tomalrussell/smif,nismod/smif,tomalrussell/smif,willu47/smif,willu47/smif,tomalrussell/smif,willu47/smif