aSession.startOperation()
aRemoveSubShapesFeature = aPart.addFeature("Remove_SubShapes")
aRemoveSubShapesFeature.selection("base_shape").setValue(anExtrusionResult, None)
-aRemoveSubShapesFeature.selectionList("subshapes").removeLast();
+aRemoveSubShapesFeature.string("creation_method").setValue("by_keep_subshapes")
+aRemoveSubShapesFeature.selectionList("subshapes_to_keep").removeLast();
aSession.finishOperation()
assert (len(aRemoveSubShapesFeature.results()) > 0)
anUnionResult = modelAPI_ResultCompSolid(modelAPI_ResultBody(aRemoveSubShapesFeature.firstResult()))