init (accidently [doxxed myself](https://github.com/JannisX11/blockbench/issues/1322))

scripts/libs/utils.lua

@@ -0,0 +1,17 @@
+local module = {}
+
+--- @param model ModelPart
+--- @param func fun(model: ModelPart)
+function module.forEachNonGroup(model, func)
+    if model:getType() == "GROUP" then
+        for _, child in pairs(model:getChildren()) do
+            module.forEachNonGroup(child, func)
+        end
+    end
+
+    if model:getType() == "CUBE" or model:getType() == "MESH" then
+        func(model)
+    end
+end
+
+return module