code: def add_service_dependency(self, dep_host_name, dep_service_description,
                                 par_host_name, par_service_description):
          
          # We create a "standard" service_dep
          prop = {
              'dependent_host_name':           dep_host_name,
              'dependent_service_description': dep_service_description,
              'host_name':                     par_host_name,
              'service_description':           par_service_description,
              'notification_failure_criteria': 'u,c,w',
              'inherits_parent': '1',
          }
          servicedep = Servicedependency(prop)
          self.add_item(servicedep)
docs: Instantiate and add a Servicedependency object to the items dict::
  
          * notification criteria is "u,c,w"
          * inherits_parent is True
  
          :param dep_host_name: dependent host name
          :type dep_host_name: str
          :param dep_service_description: dependent service description
          :type dep_service_description: str
          :param par_host_name: host name
          :type par_host_name: str
          :param par_service_description: service description
          :type par_service_description: str
          :return: None