Currently I am trying to implement a logo, which is a png file, in the react-native-router-flux navbar. I am not sure if this is possible, as I haven't found any examples online. I have tried using the 'navigationBarBackgroundImage' property from react-native-router-flux. In the code below, the sceneStyle and navigationBarStyle properties work, however, the background image does not. Any Advice?

```
    <Router
      sceneStyle={{ paddingTop: 60 }}
      navigationBarStyle={{ backgroundColor: '#80ffbf' }}
      navigationBarBackgroundImage={{src:'./Resources/GiftIt_Logo_Green.png' }}
    >

```