django xadmin m2m filter_horizontal not working

Question

I am trying to get filter_horizontal to work with xadmin, but for some reason it does not work if I just type in:

filter_horizontal = ('someField',)

Answer 1

Well like always! Right after posting my question I ACTUALLY start reading the source code of xadmin and see that all you have to do it the following :

style_fields = {'someField': 'm2m_transfer'}