public String getPreferredMaintenanceWindow() {
        return this.preferredMaintenanceWindow;
    }
<p>
Specifies the weekly time range during which system maintenance can occur, in Universal Coordinated Time (UTC).
</p>

@return Specifies the weekly time range during which system maintenance can occur, in Universal Coordinated Time
        (UTC).
aws-java-sdk-docdb/src/main/java/com/amazonaws/services/docdb/model/DBCluster.java