code: def manage_initial_service_status_brok(self, b):
          
          host_name = b.data['host_name']
          service_description = b.data['service_description']
          service_id = host_name+"/"+service_description
          logger.debug("got initial service status: %s", service_id)
  
          if host_name not in self.hosts_cache:
              logger.error("initial service status, host is unknown: %s.", service_id)
              return
  
          self.services_cache[service_id] = {
          }
          if 'customs' in b.data:
              self.services_cache[service_id]['_GRAPHITE_POST'] = \
                  sanitize_name(b.data['customs'].get('_GRAPHITE_POST', None))
  
          logger.debug("initial service status received: %s", service_id)
docs: Prepare the known services cache