code: def transform_rest_request(self, orig_request, params, method_parameters):
      request = orig_request.copy()
      body_json = {}
      for key, value in params.iteritems():
        body_json[key] = [value]
      if request.parameters:
        for key, value in request.parameters.iteritems():
          if key in body_json:
            body_json[key] = value + body_json[key]
          else:
            body_json[key] = value
      for key, value in body_json.items():
        current_parameter = method_parameters.get(key, {})
        repeated = current_parameter.get('repeated', False)
        if not repeated:
          body_json[key] = body_json[key][0]
        body_json[key] = parameter_converter.transform_parameter_value(
            key, body_json[key], current_parameter)
        message_value = body_json.pop(key)
        self._add_message_field(key, message_value, body_json)
      if request.body_json:
        self._update_from_body(body_json, request.body_json)
      request.body_json = body_json
      request.body = json.dumps(request.body_json)
      return request