# resume(_:) Begins or continues an asynchronous object-detector training session. ``` static func resume(_ session: MLTrainingSession) throws -> MLJob ``` ## Parameters `session` An [`MLTrainingSession`](/documentation/CreateML/MLTrainingSession) instance that represents the training session. ## Return Value An [`MLJob`](/documentation/CreateML/MLJob) that represents the object-detector training session. ## Discussion Use this method to start or resume a training session you get from [`makeTrainingSession(trainingData:annotationType:parameters:sessionParameters:)`](/documentation/CreateML/MLObjectDetector/makeTrainingSession(trainingData:annotationType:parameters:sessionParameters:)) or [`restoreTrainingSession(sessionParameters:)`](/documentation/CreateML/MLObjectDetector/restoreTrainingSession(sessionParameters:)). --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)