public Integer getManualSnapshotRetentionPeriod() {
        return this.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>
<p>
The default value is -1.
</p>

@return 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>
        <p>
        The default value is -1.
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/CreateClusterSnapshotRequest.java