Prevent broken creation of nodes/groups
Prevent broken creation of nodes/groups

nodes and groups with '' name are invalid.  Avoid
terrible things by erroring out on attempts to even
try at the deepest layer that can guard.

whowutwut/confluent,xcat2/confluent,xcat2/confluent,whowutwut/confluent,xcat2/confluent,jjohnson42/confluent,xcat2/confluent,jjohnson42/confluent,jufm/confluent,chenglch/confluent,jufm/confluent,jjohnson42/confluent,chenglch/confluent,whowutwut/confluent,chenglch/confluent,jufm/confluent,jufm/confluent,jufm/confluent,whowutwut/confluent,jjohnson42/confluent,chenglch/confluent,xcat2/confluent,chenglch/confluent,jjohnson42/confluent