public RetentionPeriod getRetentionPeriod() {
        return this.retentionPeriod;
    }
<p>
How long, in days, message data is kept for the channel.
</p>

@return How long, in days, message data is kept for the channel.
aws-java-sdk-iotanalytics/src/main/java/com/amazonaws/services/iotanalytics/model/Channel.java