public void setModelVariables(java.util.Collection<String> modelVariables) {
        if (modelVariables == null) {
            this.modelVariables = null;
            return;
        }

        this.modelVariables = new java.util.ArrayList<String>(modelVariables);
    }
<p>
The training data schema variables.
</p>

@param modelVariables
       The training data schema variables.
aws-java-sdk-frauddetector/src/main/java/com/amazonaws/services/frauddetector/model/TrainingDataSchema.java