SmartGWT release 4.1 power question

We recently upgraded from 2.x to 4.x and one of the new restrictions I recall was that you cannot reuse ListGridField(s) across multiple ListGrid(s). Is this correct?

If so, can you have multiple instances of ListGridField(s) with the same name and title across different ListGrid(s)?

ListGrid A
ListGrid B

ListGridField a = ListGridField("a", "A")
ListGridField b = ListGridField("a", "A")

A.setFields(a)
B.setFields(b)

Is this ok?