code: def configure_replacefor(self, ns, definition):
          
          @self.add_route(ns.relation_path, Operation.ReplaceFor, ns)
          @request(definition.request_schema)
          @response(definition.response_schema)
          @wraps(definition.func)
          def replace(**path_data):
              headers = dict()
              request_data = load_request_data(definition.request_schema)
              response_data = require_response_data(definition.func(**merge_data(path_data, request_data)))
              definition.header_func(headers, response_data)
              response_format = self.negotiate_response_content(definition.response_formats)
              return dump_response_data(
                  definition.response_schema,
                  response_data,
                  status_code=Operation.ReplaceFor.value.default_code,
                  headers=headers,
                  response_format=response_format,
              )
  
          replace.__doc__ = "Replace a {} relative to a {}".format(pluralize(ns.object_name), ns.subject_name)
docs: Register a replace-for relation endpoint.
  
          For typical usage, this relation is not strictly required; once an object exists and has its own ID,
          it is better to operate on it directly via dedicated CRUD routes.
          However, in some cases, the composite key of (subject_id, object_id) is required to look up the object.
          This happens, for example, when using DynamoDB where an object which maintains both a hash key and a range key
          requires specifying them both for access.
  
          The definition's func should be a replace function, which must:
  
          - accept kwargs for the new instance replacement parameters
          - return the instance
  
          :param ns: the namespace
          :param definition: the endpoint definition