public java.util.List<DeferredMaintenanceWindow> getDeferredMaintenanceWindows() {
        if (deferredMaintenanceWindows == null) {
            deferredMaintenanceWindows = new com.amazonaws.internal.SdkInternalList<DeferredMaintenanceWindow>();
        }
        return deferredMaintenanceWindows;
    }
<p>
Describes a group of <code>DeferredMaintenanceWindow</code> objects.
</p>

@return Describes a group of <code>DeferredMaintenanceWindow</code> objects.
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/Cluster.java