content: import React from 'react'
  
  import Fetching from './fetching.component'
  import User from './user.component'
  
  export default class NavBar extends React.Component {
    render() {
      return (
        <header className="navigation" role="banner">
          <div className="navigation-wrapper">
            <a href="" className="logo">
              <img src="https://raw.githubusercontent.com/thoughtbot/refills/master/source/images/placeholder_square.png" alt="Biblio" />
            </a>
            <a href="" className="navigation-menu-button" id="js-mobile-menu">MENU</a>
            <nav role="navigation">
              <ul id="js-navigation-menu" className="navigation-menu show">
              </ul>
            </nav>
            <div className="navigation-tools">
              <Fetching isFetching={this.props.isFetching} />
              <User user={this.props.user} />
            </div>
          </div>
        </header>
      )
    }
  }
  