class Utilitybar extends React.Component {
  constructor(props) {
    super(props)
    this.onButtonClicked = this.onButtonClicked.bind(this)
    this.state = { currentButton: null }
  }

  onButtonClicked (id) {
    this.setState({ currentButton: this.state.currentButton === id ? null : id })
  }

  render(){
    return (
      

         this.onButtonClicked(0)}>
          
        
         this.onButtonClicked(1)}>
          
        
      
    );
  }
}