The FullUndoSnapshot method in the Editor.SceneEditorSession class is marked as obsolete. It was previously used to create a full undo snapshot of the current scene with a specified title. However, this functionality is no longer supported, and it is recommended to use UndoScope or AddUndo for managing undo operations.
Since FullUndoSnapshot is obsolete, you should avoid using it in new code. Instead, consider using the UndoScope method or the AddUndo method to handle undo operations in a more efficient and supported manner.
// Example of using UndoScope instead of FullUndoSnapshot
using (var undo = sceneEditorSession.UndoScope("My Undo Operation"))
{
// Perform operations that should be undoable
// ...
// Commit the undo operation
undo.Commit();
}