public HyperParameterTrainingJobSummary withTrainingStartTime(java.util.Date trainingStartTime) {
        setTrainingStartTime(trainingStartTime);
        return this;
    }
<p>
The date and time that the training job started.
</p>

@param trainingStartTime
       The date and time that the training job started.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-sagemaker/src/main/java/com/amazonaws/services/sagemaker/model/HyperParameterTrainingJobSummary.java