text: /* @flow */
  import React, { Fragment, type Node } from 'react'
  import { NavLink } from 'react-router-dom'
  
  type Props = {
    children?: Node
  }
  
  export default (props: Props) => {
    return (
      <Fragment>
        <header>
          <NavLink to="/">Home</NavLink>
          |
          <NavLink to="/about">About</NavLink>
          |
          <NavLink to="/detail/a">Detail_A</NavLink>
          |
          <NavLink to="/detail/a/more">Detail_A_more</NavLink>
        </header>
        <content>{props.children}</content>
      </Fragment>
    )
  }
  