diff --git a/cosmo/l2vpnhelpertypes.py b/cosmo/l2vpnhelpertypes.py
index 66b428e..5bdecb7 100644
--- a/cosmo/l2vpnhelpertypes.py
+++ b/cosmo/l2vpnhelpertypes.py
@@ -82,8 +82,8 @@ def _(self, o: InterfaceType | VLANType):
 
 
 # generic supported termination types. it's this shape so that it can be directly used by isinstance()
-# (same shape as _ClassInfo)
-T = tuple[type[AbstractNetboxType], type[AbstractNetboxType]] | type[AbstractNetboxType]
+# (same shape as _ClassInfo). can be class/subclasses or N-length homogeneous tuple of class/subclasses
+T = tuple[type[AbstractNetboxType], ...] | type[AbstractNetboxType]
 
 
 # FIXME simplify this!