content: import React from 'react';
  import { ReactBootstrap, Navbar, Nav } from 'react-bootstrap';
  import { ReactRouterBootstrap, NavItemLink } from 'react-router-bootstrap';
  
  export default class Menu extends React.Component {
      render() {
          return (
              <Navbar brand='CurrencyFair-Test' toggleNavKey={0}>
                  <Nav eventKey={0}>
                      <NavItemLink to="/map" eventKey={1}>Map</NavItemLink>
                      <NavItemLink to="/grid" eventKey={2}>Grid</NavItemLink>
                      <NavItemLink to="/countries" eventKey={3}>Countries</NavItemLink>
                      <NavItemLink to="/graphs" eventKey={4}>Graphs</NavItemLink>
                  </Nav>
              </Navbar>
          );
      }
  }