Class TemplateUndecided

source code

              object --+                
                       |                
exceptions.BaseException --+            
                           |            
        exceptions.Exception --+        
                               |        
               _exceptions.Error --+    
                                   |    
         _exceptions.DependencyError --+
                                       |
                                      TemplateUndecided

Template could not be determined, because the decision is ambiguous

The exception argument is a dict mapping undecidable overlay names to the respective set of template names