typing

src/bonsai/bonsai/bim/import_ifc.py

@@ -1020,7 +1020,8 @@ class IfcImporter:
         obj.hide_select = True
         obj.hide_viewport = True
         self.project["blender"].objects.link(obj)
-        self.project["blender"].BIMCollectionProperties.obj = obj
+        collection_props = tool.Blender.get_collection_props(self.project["blender"])
+        collection_props.obj = obj
         props = tool.Blender.get_object_bim_props(obj)
         props.collection = self.collections[project.GlobalId] = self.project["blender"]
 

src/bonsai/bonsai/bim/module/bcf/operator.py

@@ -1253,8 +1253,8 @@ class ActivateBcfViewpoint(bpy.types.Operator):
         else:
             obj.data.show_background_images = False
 
-        area = next(area for area in context.screen.areas if area.type == "VIEW_3D")
-        area.spaces[0].region_3d.view_perspective = "CAMERA"
+        assert (space := tool.Blender.get_view3d_space())
+        space.region_3d.view_perspective = "CAMERA"
 
         if self.file:
             self.set_viewpoint_components(viewpoint, context)

src/bonsai/bonsai/bim/module/cost/ui.py

@@ -398,8 +398,8 @@ class BIM_PT_cost_item_types(Panel):
         op = row2.operator("bim.calculate_cost_item_resource_value", text="", icon="DISC")
         op.cost_item = cost_item.ifc_definition_id
 
-        rtprops = context.scene.BIMResourceTreeProperties
         rprops = tool.Resource.get_resource_props()
+        rtprops = rprops.tree
         if rtprops.resources and rprops.active_resource_index < len(rtprops.resources):
             if has_quantity_names:
                 op = row2.operator("bim.assign_cost_item_quantity", text="", icon="PROPERTIES")

src/bonsai/bonsai/bim/module/diff/operator.py

@@ -98,8 +98,8 @@ class VisualiseDiff(bpy.types.Operator):
                 obj.color = (0.0, 1.0, 0.0, 1.0)
             elif global_id in diff["changed"]:
                 obj.color = (0.0, 0.0, 1.0, 1.0)
-        area = next(area for area in context.screen.areas if area.type == "VIEW_3D")
-        area.spaces[0].shading.color_type = "OBJECT"
+        assert (space := tool.Blender.get_view3d_space())
+        space.shading.color_type = "OBJECT"
         return {"FINISHED"}
 
 

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

@@ -515,6 +515,8 @@ class BIM_PT_derived_coordinates(Panel):
         return context.active_object is not None
 
     def draw(self, context):
+        assert context.active_object
+        props = tool.Model.get_model_props()
         if not DerivedCoordinatesData.is_loaded:
             DerivedCoordinatesData.load()
 
@@ -529,10 +531,8 @@ class BIM_PT_derived_coordinates(Panel):
 
         row = self.layout.row(align=True)
         row.enabled = False
-        area_3d = next((area for area in context.screen.areas if area.type == "VIEW_3D"), None)
-        space_3d = next((space for space in area_3d.spaces if space.type == "VIEW_3D"), None)
 
-        if bpy.context.scene.BIMModelProperties.show_bounding_box:
+        if props.show_bounding_box:
             for axis, icon, idx in [("X", "STRIP_COLOR_01", 0), ("Y", "STRIP_COLOR_04", 1), ("Z", "STRIP_COLOR_05", 2)]:
                 row.label(text="", icon=icon)
                 row.prop(context.active_object, "dimensions", text=axis, index=idx)

src/bonsai/bonsai/bim/module/misc/operator.py

@@ -41,10 +41,11 @@ class SetOverrideColour(bpy.types.Operator):
         return context.selected_objects
 
     def execute(self, context):
+        props = tool.Misc.get_misc_props()
         for obj in context.selected_objects:
-            obj.color = context.scene.BIMMiscProperties.override_colour
-        area = next(area for area in context.screen.areas if area.type == "VIEW_3D")
-        area.spaces[0].shading.color_type = "OBJECT"
+            obj.color = props.override_colour
+        assert (space := tool.Blender.get_view3d_space())
+        space.shading.color_type = "OBJECT"
         return {"FINISHED"}
 
 

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

@@ -16,6 +16,8 @@
 # You should have received a copy of the GNU General Public License
 # along with Bonsai.  If not, see <http://www.gnu.org/licenses/>.
 
+from typing import TYPE_CHECKING
+
 from bpy.props import (
     FloatVectorProperty,
     IntProperty,
@@ -32,3 +34,7 @@ class BIMMiscProperties(PropertyGroup):
     override_colour: FloatVectorProperty(
         name="Override Colour", subtype="COLOR", default=(1, 0, 0, 1), min=0.0, max=1.0, size=4
     )
+
+    if TYPE_CHECKING:
+        total_storeys: int
+        override_colour: tuple[float, float, float, float]

src/bonsai/bonsai/bim/module/misc/ui.py

@@ -18,6 +18,8 @@
 
 import bpy
 
+import bonsai.tool as tool
+
 
 class BIM_PT_misc_utilities(bpy.types.Panel):
     bl_idname = "BIM_PT_misc_utilities"
@@ -30,7 +32,7 @@ class BIM_PT_misc_utilities(bpy.types.Panel):
 
     def draw(self, context):
         layout = self.layout
-        props = context.scene.BIMMiscProperties
+        props = tool.Misc.get_misc_props()
         row = layout.split(factor=0.2, align=True)
         row.prop(props, "override_colour", text="")
         row.operator("bim.set_override_colour")

src/bonsai/bonsai/bim/module/model/sverchok_modifier.py

@@ -31,7 +31,7 @@ import bonsai.tool as tool
 
 def update_sverchok_modifier(context):
     obj = context.active_object
-    props = obj.BIMSverchokProperties
+    props = tool.Model.get_sverchok_props(obj)
     element = tool.Ifc.get_entity(obj)
     psets = ifcopenshell.util.element.get_psets(element)
     pset = psets.get("BBIM_Sverchok", None)
@@ -72,7 +72,7 @@ class CreateNewSverchokGraph(bpy.types.Operator, tool.Ifc.Operator):
         import sverchok
 
         obj = context.active_object
-        props = obj.BIMSverchokProperties
+        props = tool.Model.get_sverchok_props(obj)
 
         node_group = bpy.data.node_groups.new("IfcNodeTree", type="SverchCustomTreeType")
         plane = node_group.nodes.new(type="SvPlaneNodeMk3")
@@ -96,7 +96,7 @@ class DeleteSverchokGraph(bpy.types.Operator, tool.Ifc.Operator):
     def _execute(self, context):
         obj = context.active_object
         element = tool.Ifc.get_entity(obj)
-        props = obj.BIMSverchokProperties
+        props = tool.Model.get_sverchok_props(obj)
         bpy.data.node_groups.remove(props.node_group)
         return {"FINISHED"}
 
@@ -113,7 +113,8 @@ class UpdateDataFromSverchok(bpy.types.Operator, tool.Ifc.Operator):
     bl_options = {"REGISTER"}
 
     def invoke(self, context, event):
-        if not context.active_object.BIMSverchokProperties.node_group:
+        props = tool.Model.get_sverchok_props(context.active_object)
+        if not props.node_group:
             return context.window_manager.invoke_props_dialog(self)
         return self._execute(context)
 
@@ -124,7 +125,7 @@ class UpdateDataFromSverchok(bpy.types.Operator, tool.Ifc.Operator):
     def _execute(self, context):
         obj = context.active_object
         element = tool.Ifc.get_entity(obj)
-        props = obj.BIMSverchokProperties
+        props = tool.Model.get_sverchok_props(obj)
         node_group = props.node_group
 
         if node_group:
@@ -196,7 +197,7 @@ class ImportSverchokGraph(bpy.types.Operator, tool.Ifc.Operator, ImportHelper):
 
         importer = sverchok.utils.sv_json_import.JSONImporter.init_from_path(self.filepath)
         obj = context.active_object
-        props = obj.BIMSverchokProperties
+        props = tool.Model.get_sverchok_props(obj)
 
         node_group = context.scene.io_panel_properties.import_tree
         if not node_group:
@@ -234,7 +235,7 @@ class ExportSverchokGraph(bpy.types.Operator, tool.Ifc.Operator, ExportHelper):
         import sverchok
 
         obj = context.active_object
-        props = obj.BIMSverchokProperties
+        props = tool.Model.get_sverchok_props(obj)
         ng = props.node_group
         destination_path = self.filepath
         if not destination_path.lower().endswith(".json"):
@@ -273,7 +274,8 @@ class ExportSverchokGraph(bpy.types.Operator, tool.Ifc.Operator, ExportHelper):
         return {"FINISHED"}
 
     def draw(self, context):
-        graph_name = context.active_object.BIMSverchokProperties.node_group.name
+        props = tool.Model.get_sverchok_props(context.active_object)
+        graph_name = props.node_group.name
         self.layout.label(text=f'Save node tree "{graph_name}" into json:')
 
         col = self.layout.column(heading="Options")  # new syntax in >= 2.90

src/bonsai/bonsai/bim/module/model/ui.py

@@ -360,7 +360,7 @@ class BIM_PT_sverchok(bpy.types.Panel):
             self.layout.label(text="Requires Sverchok Add-on", icon="ERROR")
             return
 
-        props = context.active_object.BIMSverchokProperties
+        props = tool.Model.get_sverchok_props(context.active_object)
         self.layout.prop_search(props, "node_group", bpy.data, "node_groups")
         self.layout.operator("bim.create_new_sverchok_graph", icon="ADD")
 

src/bonsai/bonsai/bim/module/nest/decorator.py

@@ -215,8 +215,6 @@ class NestDecorator:
                 self.draw_batch("LINES", line_z, color, [(0, 1)])
             else:
                 self.draw_batch("POINTS", [location], color)
-            # if context.scene.BIMNestProperties.in_aggregate_mode:
-            # return
             components = ifcopenshell.util.element.get_components(tool.Ifc.get_entity(nest))
             components_objs = [tool.Ifc.get_object(p) for p in components]
             components_objs.append(nest)

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

@@ -188,7 +188,7 @@ class BIMResourceProperties(PropertyGroup):
     @property
     def productivity(self) -> "BIMResourceProductivity":
         assert bpy.context.scene
-        productivity = bpy.context.scene.BIMResourceProductivity
+        productivity = bpy.context.scene.BIMResourceProductivity  # pyright: ignore[reportAttributeAccessIssue]
         assert isinstance(productivity, BIMResourceProductivity)
         return productivity
 

src/bonsai/bonsai/bim/module/search/operator.py

@@ -1053,8 +1053,8 @@ class ColourByProperty(Operator):
                 colourscheme[str(values[index])]["total"] += 1
                 obj.color = (*tool.Search.get_quantitative_palette(palette, value, min_value, max_value), 1)
 
-        if areas := [a for a in context.screen.areas if a.type == "VIEW_3D"]:
-            areas[0].spaces[0].shading.color_type = "OBJECT"
+        assert (space := tool.Blender.get_view3d_space())
+        space.shading.color_type = "OBJECT"
 
         props.colourscheme.clear()
 
@@ -1078,16 +1078,18 @@ class ColourByProperty(Operator):
             return (1, value)
 
     def store_state(self, context):
-        if areas := [a for a in context.screen.areas if a.type == "VIEW_3D"]:
-            self.transaction_data = {"area": areas[0], "color_type": areas[0].spaces[0].shading.color_type}
+        if space := tool.Blender.get_view3d_space():
+            self.transaction_data = {"color_type": space.shading.color_type}
 
     def rollback(self, data):
         if data:
-            data["area"].spaces[0].shading.color_type = data["color_type"]
+            assert (space := tool.Blender.get_view3d_space())
+            space.shading.color_type = data["color_type"]
 
     def commit(self, data):
         if data:
-            data["area"].spaces[0].shading.color_type = "OBJECT"
+            assert (space := tool.Blender.get_view3d_space())
+            space.shading.color_type = "OBJECT"
 
 
 class SelectByProperty(Operator):

src/bonsai/bonsai/bim/module/spatial/operator.py

@@ -512,7 +512,7 @@ class SetContainerVisibility(bpy.types.Operator):
                 containers -= set(tool.Ifc.get().by_type("IfcSpatialZone"))
             for container in containers:
                 if obj := tool.Ifc.get_object(container):
-                    if collection := obj.BIMObjectProperties.collection:
+                    if collection := tool.Blender.get_object_bim_props(obj).collection:
                         collection.hide_viewport = True
             should_hide = False
         else:
@@ -523,7 +523,7 @@ class SetContainerVisibility(bpy.types.Operator):
         while queue:
             container = queue.pop()
             if obj := tool.Ifc.get_object(container):
-                if collection := obj.BIMObjectProperties.collection:
+                if collection := tool.Blender.get_object_bim_props(obj).collection:
                     collection.hide_viewport = should_hide
             if self.should_include_children:
                 queue.extend(ifcopenshell.util.element.get_parts(container))

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

@@ -102,7 +102,10 @@ def update_shading_styles(self: "BIMStylesProperties", context: bpy.types.Contex
 
 
 def update_shader_graph(self: Union["Texture", "BIMStylesProperties"], context: bpy.types.Context) -> None:
-    props = self.id_data.BIMStylesProperties if isinstance(self, Texture) else self
+    if isinstance(self, Texture):
+        props = tool.Style.get_style_props()
+    else:
+        props = self
 
     if not props.update_graph:
         return

src/bonsai/bonsai/bim/operator.py

@@ -70,7 +70,7 @@ class SetTab(bpy.types.Operator):
         if context.area.spaces.active.search_filter:
             return {"FINISHED"}
         tool.Blender.setup_tabs()
-        aprops = tool.Blender.get_area_props(context)
+        aprops = tool.Blender.get_active_area_props(context)
         aprops.tab = self.tab
         return {"FINISHED"}
 
@@ -85,7 +85,7 @@ class SwitchTab(bpy.types.Operator):
         if context.area.spaces.active.search_filter:
             return {"FINISHED"}
         tool.Blender.setup_tabs()
-        aprops = tool.Blender.get_area_props(context)
+        aprops = tool.Blender.get_active_area_props(context)
         aprops.tab = aprops.alt_tab
         return {"FINISHED"}
 

src/bonsai/bonsai/bim/prop.py

@@ -59,7 +59,8 @@ def update_is_visible(self: "BIMTabVisibility", context: bpy.types.Context) -> N
 def update_global_tab(self: "BIMTabProperties", context: bpy.types.Context) -> None:
     tool.Blender.setup_tabs()
     screen = context.id_data
-    aprops = screen.BIMAreaProperties[screen.areas[:].index(context.area)]
+    assert isinstance(screen, bpy.types.Screen)
+    aprops = tool.Blender.get_area_props(screen)[screen.areas[:].index(context.area)]
     aprops.tab = self.tab
 
 

src/bonsai/bonsai/bim/ui.py

@@ -1031,7 +1031,7 @@ class BIM_PT_tabs(Panel):
     def draw(self, context):
         if not UIData.is_loaded:
             UIData.load()
-        aprops = tool.Blender.get_area_props(context)
+        aprops = tool.Blender.get_active_area_props(context)
         addon_prefs = tool.Blender.get_addon_preferences()
 
         row = self.layout.row()

src/bonsai/bonsai/tool/blender.py

@@ -74,7 +74,13 @@ if TYPE_CHECKING:
         BIMSolarProperties,
         RadianceExporterProperties,
     )
-    from bonsai.bim.prop import BIMObjectProperties, BIMProperties
+    from bonsai.bim.prop import (
+        BIMAreaProperties,
+        BIMCollectionProperties,
+        BIMObjectProperties,
+        BIMProperties,
+        BIMTabProperties,
+    )
 
     T = TypeVar("T")
 
@@ -138,17 +144,20 @@ class Blender(bonsai.core.tool.Blender):
         space.region_3d.view_perspective = "CAMERA"
 
     @classmethod
-    def get_area_props(cls, context: bpy.types.Context) -> bpy.types.PropertyGroup:
+    def get_active_area_props(cls, context: bpy.types.Context) -> BIMAreaProperties | BIMTabProperties:
+        FULLSCREEN_SUFFIX = "-nonnormal"  # Ctrl-space temporary fullscreen
+        assert (screen := context.screen)
         try:
-            if context.screen.name.endswith("-nonnormal"):  # Ctrl-space temporary fullscreen
-                screen = bpy.data.screens[context.screen.name.removesuffix("-nonnormal")]
+            if screen.name.endswith(FULLSCREEN_SUFFIX):
+                screen = bpy.data.screens[screen.name.removesuffix(FULLSCREEN_SUFFIX)]
                 # The original area object has its type changed to "EMPTY" apparently
                 index = [a.type for a in screen.areas].index("EMPTY")
-                return screen.BIMAreaProperties[index]
-            return context.screen.BIMAreaProperties[context.screen.areas[:].index(context.area)]
+                return cls.get_area_props(screen)[index]
+            assert (area := context.area)
+            return cls.get_area_props(screen)[screen.areas[:].index(area)]
         except IndexError:
             # Fallback in case areas aren't setup yet.
-            return context.screen.BIMTabProperties
+            return cls.get_tab_props(screen)
 
     @classmethod
     def set_active_object(cls, obj: bpy.types.Object) -> None:
@@ -165,15 +174,16 @@ class Blender(bonsai.core.tool.Blender):
     def setup_tabs(cls) -> None:
         # https://blender.stackexchange.com/questions/140644/how-can-make-the-state-of-a-boolean-property-relative-to-the-3d-view-area
         for screen in bpy.data.screens:
-            if len(screen.BIMAreaProperties) == 20:
+            area_props = cls.get_area_props(screen)
+            if len(area_props) == 20:
                 continue
-            screen.BIMAreaProperties.clear()
+            area_props.clear()
             for i in range(20):  # 20 is an arbitrary value of split areas
-                screen.BIMAreaProperties.add()
+                area_props.add()
 
     @classmethod
     def should_show_panel(cls, context: bpy.types.Context, tab: str, panel: str) -> bool:
-        aprops = cls.get_area_props(context)
+        aprops = cls.get_active_area_props(context)
         if aprops.path_from_id() == "BIMAreaProperties" and context.area.spaces.active.search_filter:
             return True
         if (is_bookmark_tab := aprops.tab == "BOOKMARK") or aprops.tab == tab:
@@ -185,6 +195,7 @@ class Blender(bonsai.core.tool.Blender):
                     return True
             elif panel_visibility.is_visible:
                 return True
+        return False
 
     @classmethod
     def is_default_scene(cls) -> bool:
@@ -330,7 +341,8 @@ class Blender(bonsai.core.tool.Blender):
 
     @classmethod
     def get_view3d_area(cls) -> Union[bpy.types.Area, None]:
-        for window in bpy.context.window_manager.windows:
+        assert (wm := bpy.context.window_manager)
+        for window in wm.windows:
             for area in window.screen.areas:
                 if area.type == "VIEW_3D":
                     return area
@@ -338,7 +350,9 @@ class Blender(bonsai.core.tool.Blender):
     @classmethod
     def get_view3d_space(cls) -> Union[bpy.types.SpaceView3D, None]:
         if area := cls.get_view3d_area():
-            return area.spaces.active
+            space = area.spaces.active
+            assert isinstance(space, bpy.types.SpaceView3D)
+            return space
 
     @classmethod
     def get_blender_prop_default_value(cls, props: bpy.types.bpy_struct, prop_name: str) -> Any:
@@ -1489,7 +1503,7 @@ class Blender(bonsai.core.tool.Blender):
     def override_scene_panel(cls, original_panel: bpy.types.Panel) -> None:
         @classmethod
         def poll_check_blender_tab(cls, context):
-            aprops = tool.Blender.get_area_props(context)
+            aprops = tool.Blender.get_active_area_props(context)
             if aprops.path_from_id() == "BIMAreaProperties" and context.area.spaces.active.search_filter:
                 return True
             return aprops.tab == "BLENDER"
@@ -1829,6 +1843,18 @@ class Blender(bonsai.core.tool.Blender):
             assert (scene := bpy.context.scene)
         return scene.BIMProperties  # pyright: ignore[reportAttributeAccessIssue]
 
+    @classmethod
+    def get_area_props(cls, screen: bpy.types.Screen) -> bpy.types.bpy_prop_collection_idprop[BIMAreaProperties]:
+        return screen.BIMAreaProperties  # pyright: ignore[reportAttributeAccessIssue]
+
+    @classmethod
+    def get_tab_props(cls, screen: bpy.types.Screen) -> BIMTabProperties:
+        return screen.BIMTabProperties  # pyright: ignore[reportAttributeAccessIssue]
+
+    @classmethod
+    def get_collection_props(cls, collection: bpy.types.Collection) -> BIMCollectionProperties:
+        return collection.BIMCollectionProperties  # pyright: ignore[reportAttributeAccessIssue]
+
     @classmethod
     def get_object_bim_props(cls, obj: bpy.types.Object) -> BIMObjectProperties:
         return obj.BIMObjectProperties  # pyright: ignore[reportAttributeAccessIssue]
@@ -1882,19 +1908,21 @@ class Blender(bonsai.core.tool.Blender):
     @classmethod
     def clear_undo_history(cls) -> None:
         """Clears the Blender history, Bonsai history, and IfcOpenShell history"""
-        old_undo_steps = bpy.context.preferences.edit.undo_steps
-        bpy.context.preferences.edit.undo_steps = 2
+        assert (preferences := bpy.context.preferences)
+        old_undo_steps = preferences.edit.undo_steps
+        preferences.edit.undo_steps = 2
         for i in range(3):
             bpy.ops.ed.undo_push(message="Undo history cleared")
-        bpy.context.preferences.edit.undo_steps = old_undo_steps
+        preferences.edit.undo_steps = old_undo_steps
         tool.Ifc.clear_history()
         old_history_size = tool.Ifc.get().history_size
         tool.Ifc.get().set_history_size(0)
         tool.Ifc.get().set_history_size(old_history_size)
 
     @classmethod
-    def get_unit_scale(cls):
-        unit_length = bpy.context.scene.unit_settings.length_unit
+    def get_unit_scale(cls) -> float:
+        assert (scene := bpy.context.scene)
+        unit_length = scene.unit_settings.length_unit
         unit_scale = 1.0
         if unit_length == "CENTIMETERS":
             unit_scale = 0.01

src/bonsai/bonsai/tool/collector.py

@@ -157,7 +157,8 @@ class Collector(bonsai.core.tool.Collector):
             return
         collection = bpy.data.collections.new(obj.name)
         props.collection = collection
-        collection.BIMCollectionProperties.obj = obj
+        collection_props = tool.Blender.get_collection_props(collection)
+        collection_props.obj = obj
         return collection
 
     @classmethod

src/bonsai/bonsai/tool/misc.py

@@ -16,7 +16,9 @@
 # You should have received a copy of the GNU General Public License
 # along with Bonsai.  If not, see <http://www.gnu.org/licenses/>.
 
-from typing import Union
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Union
 
 import bmesh
 import bpy
@@ -30,8 +32,15 @@ import bonsai.core.root
 import bonsai.core.tool
 import bonsai.tool as tool
 
+if TYPE_CHECKING:
+    from bonsai.bim.module.misc.prop import BIMMiscProperties
+
 
 class Misc(bonsai.core.tool.Misc):
+    @classmethod
+    def get_misc_props(cls) -> BIMMiscProperties:
+        return bpy.context.scene.BIMMiscProperties
+
     @classmethod
     def get_object_storey(cls, obj: bpy.types.Object) -> Union[ifcopenshell.entity_instance, None]:
         element = tool.Ifc.get_entity(obj)

src/bonsai/bonsai/tool/model.py

@@ -76,6 +76,7 @@ if TYPE_CHECKING:
         BIMRailingProperties,
         BIMRoofProperties,
         BIMStairProperties,
+        BIMSverchokProperties,
         BIMWindowProperties,
     )
 
@@ -87,23 +88,27 @@ class Model(bonsai.core.tool.Model):
 
     @classmethod
     def get_door_props(cls, obj: bpy.types.Object) -> BIMDoorProperties:
-        return obj.BIMDoorProperties
+        return obj.BIMDoorProperties  # pyright: ignore[reportAttributeAccessIssue]
 
     @classmethod
     def get_window_props(cls, obj: bpy.types.Object) -> BIMWindowProperties:
-        return obj.BIMWindowProperties
+        return obj.BIMWindowProperties  # pyright: ignore[reportAttributeAccessIssue]
 
     @classmethod
     def get_stair_props(cls, obj: bpy.types.Object) -> BIMStairProperties:
-        return obj.BIMStairProperties
+        return obj.BIMStairProperties  # pyright: ignore[reportAttributeAccessIssue]
 
     @classmethod
     def get_roof_props(cls, obj: bpy.types.Object) -> BIMRoofProperties:
-        return obj.BIMRoofProperties
+        return obj.BIMRoofProperties  # pyright: ignore[reportAttributeAccessIssue]
 
     @classmethod
     def get_railing_props(cls, obj: bpy.types.Object) -> BIMRailingProperties:
-        return obj.BIMRailingProperties
+        return obj.BIMRailingProperties  # pyright: ignore[reportAttributeAccessIssue]
+
+    @classmethod
+    def get_sverchok_props(cls, obj: bpy.types.Object) -> BIMSverchokProperties:
+        return obj.BIMSverchokProperties  # pyright: ignore[reportAttributeAccessIssue]
 
     @classmethod
     def get_array_props(cls, obj: bpy.types.Object) -> BIMArrayProperties:

src/bonsai/bonsai/tool/nest.py

@@ -124,8 +124,7 @@ class Nest(bonsai.core.tool.Nest):
 
     @classmethod
     def disable_nest_mode(cls):
-        context = bpy.context
-        props = context.scene.BIMNestProperties
+        props = cls.get_nest_props()
         for obj_prop in props.not_editing_objects:
             obj = obj_prop.obj
             obj.original.display_type = obj_prop.previous_display_type