Fem: Add suppressible extension to mesh element objects

src/Mod/Fem/femmesh/gmshtools.py

@@ -400,6 +400,8 @@ class GmshTools:
         else:
             Console.PrintMessage("  Mesh group objects, we need to get the elements.\n")
             for mg in self.mesh_obj.MeshGroupList:
+                if mg.Suppressed:
+                    continue
                 new_group_elements = meshtools.get_mesh_group_elements(mg, self.part_obj)
                 for ge in new_group_elements:
                     if ge not in self.group_elements:
@@ -479,6 +481,8 @@ class GmshTools:
             ):
                 self.outputCompoundWarning
             for mr_obj in self.mesh_obj.MeshRegionList:
+                if mr_obj.Suppressed:
+                    continue
                 # print(mr_obj.Name)
                 # print(mr_obj.CharacteristicLength)
                 # print(Units.Quantity(mr_obj.CharacteristicLength).Value)
@@ -564,6 +568,8 @@ class GmshTools:
                 # https://forum.freecad.org/viewtopic.php?f=18&t=18780&p=149520#p149520
                 self.outputCompoundWarning
             for mr_obj in self.mesh_obj.MeshBoundaryLayerList:
+                if mr_obj.Suppressed:
+                    continue
                 if mr_obj.MinimumThickness and Units.Quantity(mr_obj.MinimumThickness).Value > 0:
                     if mr_obj.References:
                         belem_list = []

src/Mod/Fem/femmesh/netgentools.py

@@ -366,6 +366,8 @@ run_netgen(**{kwds})
 
         result = []
         for reg in self.obj.MeshRegionList:
+            if reg.Suppressed:
+                continue
             for s, sub_list in reg.References:
                 if s.isDerivedFrom("App::GeoFeature") and isinstance(
                     s.getPropertyOfGeometry(), PartShape

src/Mod/Fem/femobjects/base_femmeshelement.py

@@ -46,6 +46,8 @@ class BaseFemMeshElement(base_fempythonobject.BaseFemPythonObject):
         for prop in self._get_properties():
             prop.add_to_object(obj)
 
+        obj.addExtension("App::SuppressibleExtensionPython")
+
     def _get_properties(self):
         prop = []
 
@@ -72,3 +74,6 @@ class BaseFemMeshElement(base_fempythonobject.BaseFemPythonObject):
             if prop.name == "References":
                 # change References to App::PropertyLinkSubListGlobal
                 prop.handle_change_type(obj, old_type="App::PropertyLinkSubList")
+
+        if not obj.hasExtension("App::SuppressibleExtensionPython"):
+            obj.addExtension("App::SuppressibleExtensionPython")

src/Mod/Fem/femviewprovider/view_base_femmeshelement.py

@@ -35,5 +35,9 @@ from femviewprovider import view_base_femobject
 class VPBaseFemMeshElement(view_base_femobject.VPBaseFemObject):
     """Proxy View Provider for Python base mesh element."""
 
+    def __init__(self, vobj):
+        super().__init__(vobj)
+        vobj.addExtension("Gui::ViewProviderSuppressibleExtensionPython")
+
     def isShow(self):
         return self.ViewObject.Visibility