UNSAFE_componentWillMount() {}
        UNSAFE_componentWillUpdate() {}
        UNSAFE_componentWillReceiveProps() {}
        render() {
          return (
            <div>
              <AsyncRootOne />
              <AsyncRootTwo />
            </div>
          );
        }
      }
      class AsyncRootOne extends React.Component {
        render() {
          return (
            <React.unstable_AsyncMode>
              <Foo>
                <Bar />
              </Foo>
            </React.unstable_AsyncMode>
          );
        }
      }
      class AsyncRootTwo extends React.Component {