message: set strictMode
diff: import React from "react";
  import ReactDOM from "react-dom";
  import { AppContainer } from "react-hot-loader";
  -
  +import { useStrict } from "mobx";
  import Panel from "../Panel";
  +useStrict(true);
  +
  const render = Component => {
  ReactDOM.render(
  <AppContainer>
  