def callback(response):
     raw_model = client._client._deserialize(Model, response)
     custom_model = CustomFormModel._from_generated(raw_model)
     raw_response.append(raw_model)
     raw_response.append(custom_model)
 def callback(response, _, headers):
     raw_model = client._deserialize(Model, response)
     custom_model = CustomFormModel._from_generated(
         raw_model, client.api_version)
     raw_response.append(raw_model)
     raw_response.append(custom_model)