message: Switched so custom key takes precedence
diff: @@ -2,6 +2,6 @@ import React from 'react';
  import { requireNativeComponent, Platform } from 'react-native';
  declare var NVBarButton: any;
  -var BarButtonIOS = props => <NVBarButton {...props} key={props.systemItem} />;
  +var BarButtonIOS = props => <NVBarButton key={props.systemItem} {...props} />;
  export default Platform.OS === 'ios' ? requireNativeComponent('NVBarButton', BarButtonIOS as any) : () => null;
  