How to use the react-native-push-notification.popInitialNotification function in react-native-push-notification

senderID: 'XXX',
    popInitialNotification: false,
    requestPermissions: true,
});

PushNotification.unregister();
PushNotification.localNotification = (details) => {};
PushNotification.localNotificationSchedule = (details) => {};
PushNotification.requestPermissions();
PushNotification.presentLocalNotification = (details) => {};
PushNotification.scheduleLocalNotification = (details) => {};
PushNotification.cancelLocalNotifications = (details) => {};
PushNotification.cancelAllLocalNotifications();
PushNotification.setApplicationIconBadgeNumber(1);
PushNotification.getApplicationIconBadgeNumber((badgeCount) => {});
PushNotification.popInitialNotification((notification) => {});
PushNotification.checkPermissions((checkPermissions) => {});
PushNotification.abandonPermissions();
PushNotification.registerNotificationActions(['Accept', 'Reject', 'Yes', 'No']);
PushNotification.clearAllNotifications();

new Promise(resolve =>
    PushNotifications.popInitialNotification(n => {
      const notification = Constants.normalizePush(n)
      if (notification) {
        resolve(PushGen.createNotification({notification}))
      }
      resolve(null)
    })
  )

sendDeviceTokenToServer(deviceToken) {
    PushNotification.popInitialNotification((notification) => {
      if (notification) { this.handleNotification(notification); }
    });
    fetch(config.serverURL + '/api/user/device', {
      method: 'post',
      headers: {
        Accept: 'application/json',
        'Content-Type': 'application/json',
        'x-access-token': this.props.user.accessToken,
      },
      body: JSON.stringify({
        deviceToken,
      }),
    })
    .then(response => response.json())
    .then(json => {
      if (json.success === false) {

new Promise(resolve => {
    PushNotifications.popInitialNotification(n => {
      const notification = Constants.normalizePush(n)
      if (!notification) {
        resolve(null)
        return
      }
      if (notification.type === 'follow') {
        if (notification.username) {
          resolve({startupFollowUser: notification.username})
          return
        }
      } else if (notification.type === 'chat.newmessage') {
        if (notification.conversationIDKey) {
          resolve({startupConversation: notification.conversationIDKey})
          return
        }
      }