Docs/imported solid model

src/ansys/acp/core/_tree_objects/imported_solid_model.py

@@ -354,9 +354,14 @@
         layup_mapping_object_pb2_grpc.ObjectServiceStub,
     )
 
-    def refresh(self, path: _PATH, format: SolidModelImportFormat) -> None:  # type: ignore
-        """Re-import the solid model from the external file."""
-        self.format = format
+    def refresh(self, path: _PATH, format: SolidModelImportFormat | None = None) -> None:  # type: ignore
+        """
+        Re-import the solid model from the external file.
+
+        The ``format`` parameter is only used to switch it. Otherwise, the current value is used.
+        """
+        if format is not None:
+            self.format = format
         self.external_path = self._server_wrapper.auto_upload(path)
         with wrap_grpc_errors():
             self._get_stub().Refresh(  # type: ignore