src/main/java/com/googlecode/objectify/impl/ref/LiveRef.java
private Objectify ofy() {
		// If we have an expired transaction context, we need a new context
		if (ofy == null || (ofy.getTransaction() != null && !ofy.getTransaction().isActive()))
			ofy = ObjectifyService.ofy();

		return ofy;
	}
private Objectify ofy() {
		// If we have an expired transaction context, we need a new context
		if (ofy == null || (ofy.getTransaction() != null && !ofy.getTransaction().isActive()))
			ofy = ObjectifyService.ofy();

		return ofy;
	}
Get the current objectify instance associated with this ref