code: func NewResponse(code int, body interface{}, headers ...map[string]string) *Response {
  	response := &Response{
  		Code: code,
  		Body: body,
  	}
  	if len(headers) != 0 {
  		response.Headers = make(map[string]string)
  		for _, eachHeaderMap := range headers {
  			for eachKey, eachValue := range eachHeaderMap {
  				response.Headers[eachKey] = eachValue
  			}
  		}
  	}
  	return response
  }
docs: // NewResponse returns an API Gateway response object