react.dev/examples/context/reference-caveats-solution.js

class App extends React.Component {
  constructor(props) {
    super(props);
    // highlight-range{2}
    this.state = {
      value: {something: 'something'},
    };
  }

  render() {
    // highlight-range{2}
    return (
      <MyContext.Provider value={this.state.value}>
        <Toolbar />
      </MyContext.Provider>
    );
  }
}