code: function getMatchedRoute(children, pathname) {
    return React.Children.toArray(children).find(child => {
      return matchPath(pathname, {
        exact: child.props.exact,
        path: child.props.path,
      });
    }) || NO_MATCH;
  }
docs: Some superfluous work, but something we need to do in order
  to persist matches/allow for nesting/etc.