How to use the react-native-popup-menu.debug function in react-native-popup-menu

{ Component: Example, name: 'Advanced example' },
  { Component: ControlledExample, name: 'Controlled example' },
  { Component: MenuMethodsExample, name: 'Controlling menu using menu methods' },
  { Component: ExtensionExample, name: 'Extensions example' },
  { Component: ModalExample, name: 'Modal example' },
  { Component: StylingExample, name: 'Styling example' },
  { Component: TouchableExample, name: 'Touchable config example' },
  { Component: NonRootExample, name: 'Non root example' },
  { Component: CloseOnBackExample, name: 'Close on back button press example' },
  { Component: FlatListExample, name: 'Using FlatList' },
  { Component: InFlatListExample, name: 'Menu in FlatList' },
  { Component: PopoverExample, name: 'Popover renderer' },
];

// show debug messages for demos.
Menu.debug = true;

export default class Demo extends Component {
  constructor(props, ctx) {
    super(props, ctx);
    this.state = {
      selected: undefined,
    };
  }
  render() {
    if (this.state.selected) {
      return ;
    }
    return (