> res
<webfakes_reeponse>
fields and methods:
  app                    # the webfakes_app the response belongs to
  locals                 # response-wide shared data
  get_header(field)      # query response header
  on_response(fun)       # call handler function for complete response
  redirect(path, status) # send redirect response
  render(view, locals)   # render template
  send(body)             # send text or raw data
  send_file(path, root)  # send a file (automatic Content-Type)
  send_json(object, text, ...)
                         # send JSON data
  send_status(status)    # send HTTP status and empty body
  set_header(field, value)
                              # set a response header
  set_status(status)     # set response status code
  set_type(type)         # set Content-Type
 # see ?webfakes_response for details

