use __module__ from upstream Model
use __module__ from upstream Model

jtiki/djangocms-cascade,jtiki/djangocms-cascade,jrief/djangocms-cascade,rfleschenberg/djangocms-cascade,jtiki/djangocms-cascade,jrief/djangocms-cascade,rfleschenberg/djangocms-cascade,jrief/djangocms-cascade,haricot/djangocms-bs4forcascade,rfleschenberg/djangocms-cascade,haricot/djangocms-bs4forcascade