Ontology: return a QuerySet for get_classes query
Ontology: return a QuerySet for get_classes query

fzadow/CATMAID,htem/CATMAID,fzadow/CATMAID,htem/CATMAID,fzadow/CATMAID,htem/CATMAID,fzadow/CATMAID,htem/CATMAID