public Cluster withPreferredMaintenanceWindow(String preferredMaintenanceWindow) {
        setPreferredMaintenanceWindow(preferredMaintenanceWindow);
        return this;
    }
<p>
The weekly time range during which system maintenance can occur, in Universal Coordinated Time (UTC).
</p>
<p>
<i>Format</i>: <code>ddd:hh24:mi-ddd:hh24:mi</code>
</p>

@param preferredMaintenanceWindow
       The weekly time range during which system maintenance can occur, in Universal Coordinated Time (UTC).</p>
       <p>
       <i>Format</i>: <code>ddd:hh24:mi-ddd:hh24:mi</code>
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-docdbelastic/src/main/java/com/amazonaws/services/docdbelastic/model/Cluster.java