I have a Scene with custom navbar

```
                <Scene
                      navBar={CustomNavBar}
                      component={MComponent}                   

                  />

```

MyCOmponent have on method called \_hello()

```
 export default class MComponentextends PureComponent {
      constructor(props) {
         super(props);     
     }
   _hello = () => {
    console.warn('HELLO WORLD')
}

```

Is it possible to call MyComponent \_hello() method inside my navbar component ?

```
export default class CustomNavBar extends Component {
constructor(props) {
    super(props);
    this.state = {        
    };
    this.props._hello () // does not work
    }
}

```