code: def configure_deletefor(self, ns, definition):
          
          @self.add_route(ns.relation_path, Operation.DeleteFor, ns)
          @wraps(definition.func)
          def delete(**path_data):
              headers = dict()
              response_data = dict()
              require_response_data(definition.func(**path_data))
              definition.header_func(headers, response_data)
              response_format = self.negotiate_response_content(definition.response_formats)
              return dump_response_data(
                  "",
                  None,
                  status_code=Operation.DeleteFor.value.default_code,
                  headers=headers,
                  response_format=response_format,
              )
  
          delete.__doc__ = "Delete a {} relative to a {}".format(pluralize(ns.object_name), ns.subject_name)
docs: Register a delete-for relation endpoint.
  
          The definition's func should be a delete function, which must:
          - accept kwargs for path data
          - return truthy/falsey
  
          :param ns: the namespace
          :param definition: the endpoint definition