Use property_unset instead of in and del

src/bonsai/bonsai/bim/module/geometry/prop.py

@@ -193,9 +193,8 @@ def update_is_adding_representation_layer(self: "BIMObjectGeometryProperties", c
             return
         return
 
-    if "representation_layer" in self:
-        del self["representation_layer"]
-        del self["is_adding_representation_layer"]
+    self.property_unset("representation_layer")
+    self.property_unset("is_adding_representation_layer")
 
 
 def update_is_editing_item_layer(self: "BIMObjectGeometryProperties", context: bpy.types.Context) -> None:
@@ -216,9 +215,8 @@ def update_is_editing_item_layer(self: "BIMObjectGeometryProperties", context: b
             self.representation_item_layer = str(layer.id())
         return
 
-    if "representation_item_layer" in self:
-        del self["representation_item_layer"]
-        del self["is_editing_item_layer"]
+    self.property_unset("representation_item_layer")
+    self.property_unset("is_editing_item_layer")
 
 
 class BIMObjectGeometryProperties(PropertyGroup):

src/bonsai/bonsai/tool/clash.py

@@ -119,8 +119,7 @@ class Clash(bonsai.core.tool.Clash):
         if not clash_set:
             return
         clash_set.clashes.clear()
-        if "clashes_loaded" in clash_set:
-            del clash_set["clashes_loaded"]
+        clash_set.property_unset("clashes_loaded")
 
     @classmethod
     def load_clash_sets(cls, fn: str) -> None:

src/bonsai/bonsai/tool/owner.py

@@ -319,8 +319,7 @@ class Owner(bonsai.core.tool.Owner):
     @classmethod
     def clear_application(cls) -> None:
         props = cls.get_owner_props()
-        if "active_application_id" in props:
-            del props["active_application_id"]
+        props.property_unset("active_application_id")
 
     @classmethod
     def import_application_attributes(cls) -> None: