code: public Cluster withDeferredMaintenanceWindows(DeferredMaintenanceWindow... deferredMaintenanceWindows) {
          if (this.deferredMaintenanceWindows == null) {
              setDeferredMaintenanceWindows(new com.amazonaws.internal.SdkInternalList<DeferredMaintenanceWindow>(deferredMaintenanceWindows.length));
          }
          for (DeferredMaintenanceWindow ele : deferredMaintenanceWindows) {
              this.deferredMaintenanceWindows.add(ele);
          }
          return this;
      }
docs: <p>
  Describes a group of <code>DeferredMaintenanceWindow</code> objects.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setDeferredMaintenanceWindows(java.util.Collection)} or
  {@link #withDeferredMaintenanceWindows(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param deferredMaintenanceWindows
  Describes a group of <code>DeferredMaintenanceWindow</code> objects.
  @return Returns a reference to this object so that method calls can be chained together.