Redux-react: Why const "Provider" and "connect" are deleted

Hello,

At the end of the code of this exercise we have this:

const Provider = ReactRedux.Provider;
const connect = ReactRedux.connect;

// define the Container component here:
const Container = connect(mapStateToProps,mapDispatchToProps)(Presentational)

class AppWrapper extends React.Component {
  constructor(props) {
    super(props);
  }
  render() {
    // complete the return statement:
    return (
      <Provider store={store}>
        <Container />
      </Provider>
      );
  }
};

And at the end of the following and also ending exercise we have this:


const Container = connect(mapStateToProps, mapDispatchToProps)(Presentational);

class AppWrapper extends React.Component {
  render() {
    return (
      <Provider store={store}>
        <Container/>
      </Provider>
    );
  }
};

This const are deleted, Why ?

const Provider = ReactRedux.Provider;
const connect = ReactRedux.connect;

And this are deleted of the AppWraper, why ? maybe a hook ?:

  constructor(props) {
    super(props);

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