[Geotools-gt2-users] How to write shapefile of type 'Polygon' no 'Polygon ZM' in GT 10.2?

[Ryan M. <ry...@gm...>]

After upgrading an application from 9.x to 10.2 I am hitting an issue with
the shape files it create.

I am using code similar to:
http://docs.geotools.org/latest/userguide/tutorial/feature/csv2shp.html
rather than Point, it uses Polygon (from JTS)

 builder.add( "Extent", Polygon.class );

With 9.x this created a shapefile we can easily load in most things.  With
10.2, it create one that looks valid, but I don't see any data.  In ArcMap
I notice the type for 10.2 is "Polygon ZM":
https://www.monosnap.com/image/NrCKomSD1ZvcdbJ2UyNE0CwDF

How do I make this a simple Polygon without ZM support?

Thanks
Ryan