Porting example

I started looking at the Filter object e.g. XFilter in the helperapi, XFilter is implemented by FilterImpl.java but it expects to be initialised by an XAutoFilter implementation object

so already we need to think about implementing not only XFilter but XAutoFilter

looking at XAutoFilter.idl we see that there is a Filters() attribute/method that returns a Collection of Filters, so additionally we now need a Filters object ( and collections are pretty much completely different beasts in helperapi and oovbaapi )

also this is an attriute of sheet, where the routine to returns the XAutoFilter