code: func (c *IO) CloseWithParams(v *IOCloseParams) (*gcdmessage.ChromeResponse, error) {
  	return gcdmessage.SendDefaultRequest(c.target, c.target.GetSendCh(), &gcdmessage.ParamRequest{Id: c.target.GetId(), Method: "IO.close", Params: v})
  }
docs: // CloseWithParams - Close the stream, discard any temporary backing storage.