docs: public void clearMemoryCaches() {
      Predicate<CacheKey> allPredicate =
          new Predicate<CacheKey>() {
            @Override
            public boolean apply(CacheKey key) {
              return true;
            }
          };
      mBitmapMemoryCache.removeAll(allPredicate);
      mEncodedMemoryCache.removeAll(allPredicate);
    }