code: def do_mntr(self, params):
          
          hosts = params.hosts if params.hosts != "" else None
  
          if hosts is not None and invalid_hosts(hosts):
              self.show_output("List of hosts has the wrong syntax.")
              return
  
          if self._zk is None:
              self._zk = XClient()
  
          try:
              content = get_matching(self._zk.mntr(hosts), params.match)
              self.show_output(content)
          except XClient.CmdFailed as ex:
              self.show_output(str(ex))
docs: \x1b[1mNAME\x1b[0m
          mntr - Executes the mntr four-letter command
  
  \x1b[1mSYNOPSIS\x1b[0m
          mntr [hosts] [match]
  
  \x1b[1mOPTIONS\x1b[0m
          * hosts: the hosts to connect to (default: the current connected host)
          * match: only output lines that include the given string (default: '')
  
  \x1b[1mEXAMPLES\x1b[0m
          > mntr
          zk_version      3.5.0--1, built on 11/14/2014 10:45 GMT
          zk_min_latency  0
          zk_max_latency  8
          zk_avg_latency  0