code: def fill_predictive_missing_parameters(self):
          
          if hasattr(self, 'host_name') and not hasattr(self, 'address'):
              self.address = self.host_name
          if hasattr(self, 'host_name') and not hasattr(self, 'alias'):
              self.alias = self.host_name
          if self.initial_state == 'd':
              self.state = 'DOWN'
          elif self.initial_state == 'x':
              self.state = 'UNREACHABLE'
docs: Fill address with host_name if not already set
          and define state with initial_state
  
          :return: None