old_contents: import Cache from 'cache-storage';
  import FileStorage from 'cache-storage/Storage/FileSyncStorage';
  import MemoryStorage from 'cache-storage/Storage/MemorySyncStorage';
  
  // Wraps an image retriever with caching
  export default class CachingImageRetriever {
    // eslint-disable-next-line no-magic-numbers
    constructor(imageRetriever, storageType = 'file') {
      if (!imageRetriever) {
        throw new Error('imageRetriever must be specified.');
      }
  
      if (storageType !== 'file' && storageType !== 'memory') {
        throw new Error('file or memory must be specified.');
      }
  
      this.imageRetriever = imageRetriever;
      this.storageType = storageType;
  
      const storage = storageType === 'file'
        ? new FileStorage('./dist/cache')
        : new MemoryStorage();
  
      this.cache = new Cache(storage, 'graph-images');
    }
  
    getImage(email) {
      if (!email) {
        return Promise.resolve(null);
      }
  
      const cachedImage = this.cache.load(email);
  
      if (cachedImage !== null) {
        return Promise.resolve(new Buffer(cachedImage));
      }
  
      return this.imageRetriever
        .getImage(email)
        .then(image => {
          if (image !== null) {
            this.cache.save(email, image);
          }
  
          return image;
        });
    }
  
    clear() {
      this.cache.clean(Cache.ALL);
    }
  }
  
new_contents: import Cache from 'cache-storage';
  import FileStorage from 'cache-storage/Storage/FileSyncStorage';
  import MemoryStorage from 'cache-storage/Storage/MemorySyncStorage';
  
  // Wraps an image retriever with caching
  export default class CachingImageRetriever {
    // eslint-disable-next-line no-magic-numbers
    constructor(imageRetriever, storageType = 'file') {
      if (!imageRetriever) {
        throw new Error('imageRetriever must be specified.');
      }
  
      if (storageType !== 'file' && storageType !== 'memory') {
        throw new Error('file or memory must be specified.');
      }
  
      this.imageRetriever = imageRetriever;
      this.storageType = storageType;
  
      const storage = storageType === 'file'
        ? new FileStorage('./cache')
        : new MemoryStorage();
  
      this.cache = new Cache(storage, 'graph-images');
    }
  
    getImage(email) {
      if (!email) {
        return Promise.resolve(null);
      }
  
      const cachedImage = this.cache.load(email);
  
      if (cachedImage !== null) {
        return Promise.resolve(new Buffer(cachedImage));
      }
  
      return this.imageRetriever
        .getImage(email)
        .then(image => {
          if (image !== null) {
            this.cache.save(email, image);
          }
  
          return image;
        });
    }
  
    clear() {
      this.cache.clean(Cache.ALL);
    }
  }
  
subject: Update cache directory location