1useEffect(() => {
2  const gestureEndListener = () => {
3    console.log('iOS back gesture ended');
4  };
5  // https://reactnavigation.org/docs/3.x/navigation-events
6  const gestureHandler = navigation.addListener('didBlur', gestureEndListener);
7  return () => {
8    gestureHandler.remove();
9  };
10}, []);