docs: def define_example_values(self, http_method, route, values, update=False):
          """Define example values for a given request.
  
          By default, example values are determined from the example properties
          in the schema. But if you want to change the example used in the
          documentation for a specific route, and this method lets you do that.
  
          :param str http_method: An HTTP method, like "get".
          :param str route: The route to match.
          :param dict values: A dictionary of parameters for the example request.
          :param bool update: If True, the values will be merged into the default
              example values for the request. If False, the values will replace
              the default example values.
          """
          self.defined_example_values[(http_method.lower(), route)] = {
              'update': update,
              'values': values
          }