how to get the cache size？ about react-native-image-cache-hoc HOT 3 OPEN

async getCacheSize(){
    if (!await this.exists('cache')) {
      return 0;
    }
     // Get blobStatObjects.
     let lstat = await RNFetchBlob.fs.lstat(this.baseFilePath + 'cache');

     let currentCacheSize = lstat.reduce((cacheSize, blobStatObject) => {
       return cacheSize + parseInt(blobStatObject.size);
     }, 0);

     return currentCacheSize;
  }

async getCacheSize() {
    if (!(await this.exists("cache")) && !(await this.exists("permanent"))) {
      return 0;
    }
    // Get blobStatObjects.
    let lstatAll = [];
    if (await this.exists("cache")) {
      lstatAll = [
        ...lstatAll,
        ...(await RNFetchBlob.fs.lstat(this.baseFilePath + "cache"))
      ];
    }
    if (await this.exists("permanent")) {
      lstatAll = [
        ...lstatAll,
        ...(await RNFetchBlob.fs.lstat(this.baseFilePath + "permanent"))
      ];
    }
    let currentCacheSize = lstatAll.reduce((cacheSize, blobStatObject) => {
      return cacheSize + parseInt(blobStatObject.size);
    }, 0);
    return currentCacheSize;
  }