How to support multi-line text fields in a TableView

Does anyone know how to support multi-line text fields in a TableView?  I can see how to do it with a NSTextField.  In that case you can use the delegate methods to control the behavior.  But the NSTableColumn implements NSTextFieldCell not NSTextField.  You would think one would inherate from the other but it is not the case.

I really need to be able to enter more than one line of text (not text wrapping) delimited with carriage returns.  Any help with this would be greatly appreciated.

Thanks.