feat: expose modeler.designs attribute (#1401)

Co-authored-by: pyansys-ci-bot <92810346+pyansys-ci-bot@users.noreply.github.com>

Author: RobPasMue

doc/changelog.d/1401.added.md

@@ -0,0 +1 @@
+expose ``modeler.designs`` attribute

src/ansys/geometry/core/modeler.py

@@ -145,6 +145,16 @@ def client(self) -> GrpcClient:
         """``Modeler`` instance client."""
         return self._grpc_client
 
+    @property
+    def designs(self) -> dict[str, "Design"]:
+        """All designs within the modeler workspace.
+
+        Notes
+        -----
+        This property is read-only. **DO NOT** modify the dictionary.
+        """
+        return self._designs
+
     def create_design(self, name: str) -> "Design":
         """Initialize a new design with the connected client.
 

tests/integration/test_design.py

@@ -1942,8 +1942,8 @@ def test_multiple_designs(modeler: Modeler, tmp_path_factory: pytest.TempPathFac
     assert design1.is_active
 
     # Check the same thing inside the modeler
-    assert not modeler._designs[design2.design_id].is_active
-    assert modeler._designs[design1.design_id].is_active
+    assert not modeler.designs[design2.design_id].is_active
+    assert modeler.designs[design1.design_id].is_active
 
 
 def test_get_active_design(modeler: Modeler):

tests/integration/test_design_import.py

@@ -121,7 +121,7 @@ def test_design_import_simple_case(modeler: Modeler):
 
     # And now assert all its elements
     assert read_design is not None
-    assert len(new_client._designs) == 1
+    assert len(new_client.designs) == 1
 
     # Check the design
     _checker_method(read_design, design)