message: Overrode resume in constructor
  Needs to be earlier so can, e.g., navigate/redirect from componentDidMount in child (which runs before parent). Not idea, because componentWillUnmount not guaranteed to be called but it means error happened with initial mount
diff: @@ -8,11 +8,8 @@ class NavigationHandler extends React.Component<{ stateNavigator: StateNavigator
  super(props);
  var { stateNavigator } = this.props;
  this.originalResumeNavigation = stateNavigator['resumeNavigation'];
  - this.state = { stateNavigator };
  - }
  -
  - componentDidMount() {
  this.props.stateNavigator['resumeNavigation'] = this.resumeNavigation.bind(this);
  + this.state = { stateNavigator };
  }
  componentWillUnmount() {
  