public UpdateProgramTransition withDurationMillis(Long durationMillis) {
        setDurationMillis(durationMillis);
        return this;
    }
<p>
The duration of the live program in seconds.
</p>

@param durationMillis
       The duration of the live program in seconds.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-mediatailor/src/main/java/com/amazonaws/services/mediatailor/model/UpdateProgramTransition.java