---
title: "restoreTrainingSession(sessionParameters:)"
framework: createml
role: symbol
role_heading: Type Method
path: "createml/mlboostedtreeclassifier/restoretrainingsession(sessionparameters:)"
---

# restoreTrainingSession(sessionParameters:)

Restores an existing training session.

## Declaration

```swift
static func restoreTrainingSession(sessionParameters: MLTrainingSessionParameters) throws -> MLTrainingSession<MLBoostedTreeClassifier>
```

## Parameters

- `sessionParameters`: Training session parameters.

## Return Value

Return Value A MLTrainingSession that can be used to resume training.

## Discussion

Discussion The method requires the a valid sessionDirectory parameter.

## See Also

### Training a boosted tree classifier asynchronously

- [train(trainingData:targetColumn:featureColumns:parameters:sessionParameters:)](createml/mlboostedtreeclassifier/train(trainingdata:targetcolumn:featurecolumns:parameters:sessionparameters:).md)
- [makeTrainingSession(trainingData:targetColumn:featureColumns:parameters:sessionParameters:)](createml/mlboostedtreeclassifier/maketrainingsession(trainingdata:targetcolumn:featurecolumns:parameters:sessionparameters:).md)
- [resume(_:)](createml/mlboostedtreeclassifier/resume(_:).md)