elds when object is loaded from the storage in <code>onLoad()</code> method
which is invoked for any persistent object after loading it from the storage (i.e. after restoring values of all persistent
fields).<P>

So summarizing all above, proposed mechanism is convenient and easy to use because it doesn't require programmer
to explicitly load any referenced object and from another point of view it is flexible above by providing programmer control
on object loading. Only those classes (usually containers) wh