docs: public PersistenceBroker getInnermostDelegate()
  	{
  		PersistenceBroker broker = this.m_broker;
  		while (broker != null && broker instanceof DelegatingPersistenceBroker)
  		{
  			broker = ((DelegatingPersistenceBroker) broker).getDelegate();
  			if (this == broker)
  			{
  				return null;
  			}
  		}
  		return broker;
  	}