Support other voiding IfcFeatureElementSubtraction elements #3889

Support other voiding IfcFeatureElementSubtraction besides IfcOpeningElement.

src/ifcopenshell-python/ifcopenshell/api/root/copy_class.py

@@ -130,7 +130,7 @@ class Usecase:
             elif inverse.is_a("IfcRelVoidsElement") and inverse.RelatingBuildingElement == from_element:
                 opening = inverse.RelatedOpeningElement
                 # We don't copy filled openings, since there is no guarantee the filling is also copied
-                if not opening.HasFillings:
+                if not opening.is_a("IfcOpeningElement") or not opening.HasFillings:
                     new_opening = ifcopenshell.api.run("root.copy_class", self.file, product=opening)
                     new_opening.VoidsElements[0].RelatingBuildingElement = to_element
                     if new_opening.ObjectPlacement and new_opening.ObjectPlacement.is_a("IfcLocalPlacement"):

src/ifcopenshell-python/ifcopenshell/api/void/remove_opening.py

@@ -50,6 +50,7 @@ class Usecase:
     def execute(self):
         for rel in self.settings["opening"].VoidsElements:
             self.file.remove(rel)
-        for rel in self.settings["opening"].HasFillings:
-            self.file.remove(rel)
+        if self.settings["opening"].is_a("IfcOpeningElement"):
+            for rel in self.settings["opening"].HasFillings:
+                self.file.remove(rel)
         ifcopenshell.api.run("root.remove_product", self.file, product=self.settings["opening"])