docs: def hexdump(self, lfilter=None):
          """Same as nsummary(), except that packets are also hexdumped
          lfilter: a truth function that decides whether a packet must be displayed"""  # noqa: E501
          for i, res in enumerate(self.res):
              p = self._elt2pkt(res)
              if lfilter is not None and not lfilter(p):
                  continue
              print("%s %s %s" % (conf.color_theme.id(i, fmt="%04i"),
                                  p.sprintf("%.time%"),
                                  self._elt2sum(res)))
              hexdump(p)