src/main/java/com/googlecode/objectify/LoadResult.java
public final T safe() throws NotFoundException {
		T t = now();
		if (t == null)
			throw new NotFoundException(key);
		else
			return t;
	}
public final T safe() throws NotFoundException {
		T t = now();
		if (t == null)
			throw new NotFoundException(key);
		else
			return t;
	}
Like now(), but throws NotFoundException instead of returning null.
@throws NotFoundException if the loaded value was not found