How to use the expo-ads-admob.AdMobInterstitial.getIsReadyAsync function in expo-ads-admob

reloadInterstitial = async () => {
    if (!(await AdMobInterstitial.getIsReadyAsync())) {
      let isInterstitialReady = false;
      try {
        await AdMobInterstitial.requestAdAsync({
          servePersonalizedAds: this.state.servePersonalizedAds,
        });
        isInterstitialReady = true;
      } catch (e) {
        if (e.code === 'E_AD_ALREADY_LOADED') {
          isInterstitialReady = true;
        } else {
          console.warn('AdMobInterstitial.requestAdAsync', e);
        }
      } finally {
        this.setState({ isInterstitialReady });
      }
    }