mastodon-docker-playground/app/javascript/mastodon/features/compose/containers/navigation_container.js

import { connect }   from 'react-redux';
import NavigationBar from '../components/navigation_bar';

const mapStateToProps = (state, props) => {
  return {
    account: state.getIn(['accounts', state.getIn(['meta', 'me'])]),
  };
};

export default connect(mapStateToProps)(NavigationBar);