@Override
    public String toString() {
        return this.value;
    }
When you use the setting Time delta to adjust the sync between your sidecar captions and your video, use this setting
to specify the units for the delta that you specify. When you don't specify a value for Time delta units,
MediaConvert uses seconds by default.
aws-java-sdk-mediaconvert/src/main/java/com/amazonaws/services/mediaconvert/model/FileSourceTimeDeltaUnits.java