code: def raise_enter_downtime_log_entry(self):
          
          if not self.__class__.log_downtimes:
              return
  
          brok = make_monitoring_log(
              'info', "HOST DOWNTIME ALERT: %s;STARTED; "
                      "Host has entered a period of scheduled downtime" % (self.get_name())
          )
          self.broks.append(brok)
docs: Raise HOST DOWNTIME ALERT entry (critical level)
          Format is : "HOST DOWNTIME ALERT: *get_name()*;STARTED;
                      Host has entered a period of scheduled downtime"
          Example : "HOST DOWNTIME ALERT: test_host_0;STARTED;
                     Host has entered a period of scheduled downtime"
  
          :return: None