public void setManualSnapshotRetentionPeriod(Integer manualSnapshotRetentionPeriod) {
        this.manualSnapshotRetentionPeriod = manualSnapshotRetentionPeriod;
    }
<p>
The number of days that a manual snapshot is retained. If the value is -1, the manual snapshot is retained
indefinitely.
</p>
<p>
The value must be either -1 or an integer between 1 and 3,653.
</p>

@param manualSnapshotRetentionPeriod
       The number of days that a manual snapshot is retained. If the value is -1, the manual snapshot is retained
       indefinitely. </p>
       <p>
       The value must be either -1 or an integer between 1 and 3,653.
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/Snapshot.java