Stratified K-fold validation using crossval funtion

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Jhon Gray 2021-4-20

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https://ww2.mathworks.cn/matlabcentral/answers/807662-stratified-k-fold-validation-using-crossval-funtion

I am trying to customize the "Weighted kNN"-based classification code generated after a 10-fold cross validation on my data using the Classification Learner App (Using the Generate Function option in the app).

Query 1:

partitionedModel = crossval(trainedClassifier.ClassificationKNN, 'KFold',10);

After generating the code, I found that the above code is responsible for partitioning the data. I have an imbalanced dataset and I believe that "Stratified" k-fold cross validation ensures equal amount of data is considered from each class.

Query: Does the above code automatically perform Stratified k-fold cross validation? If not, how do I include it in the code?