code: def deserialize(obj):
      
      # Be careful of shallow copy here
      target = dict(obj)
      class_name = None
      if '__class__' in target:
          class_name = target.pop('__class__')
      if '__module__' in obj:
          obj.pop('__module__')
      # Use getattr(module, class_name) for custom types if needed
      if class_name == 'datetime':
          return datetime.datetime(tzinfo=utc, **target)
      if class_name == 'StreamingBody':
          return StringIO(target['body'])
      # Return unrecognized structures as-is
      return obj
docs: Convert JSON dicts back into objects.