public void setDurationMillis(Long durationMillis) {
        this.durationMillis = durationMillis;
    }
<p>
The duration of the alternateMedia in milliseconds.
</p>

@param durationMillis
       The duration of the alternateMedia in milliseconds.
aws-java-sdk-mediatailor/src/main/java/com/amazonaws/services/mediatailor/model/AlternateMedia.java