src/main/java/com/googlecode/objectify/cache/EntityMemcache.java
private Map<Key, Object> cacheGetAll(final Collection<Key> keys) {
		try {
			return this.memcache.getAll(keys);
		} catch (Exception ex) {
			// Some sort of serialization error, just wipe out the values
			log.warn("Error fetching values from memcache, deleting keys", ex);

			this.memcache.deleteAll(keys);

			return new HashMap<>();
		}
	}
private Map<Key, Object> cacheGetAll(final Collection<Key> keys) {
		try {
			return this.memcache.getAll(keys);
		} catch (Exception ex) {
			// Some sort of serialization error, just wipe out the values
			log.warn("Error fetching values from memcache, deleting keys", ex);

			this.memcache.deleteAll(keys);

			return new HashMap<>();
		}
	}
Bulk get on keys, getting the raw objects