code: public DescribeMaintenanceWindowsResult withWindowIdentities(MaintenanceWindowIdentity... windowIdentities) {
          if (this.windowIdentities == null) {
              setWindowIdentities(new com.amazonaws.internal.SdkInternalList<MaintenanceWindowIdentity>(windowIdentities.length));
          }
          for (MaintenanceWindowIdentity ele : windowIdentities) {
              this.windowIdentities.add(ele);
          }
          return this;
      }
docs: <p>
  Information about the Maintenance Windows.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setWindowIdentities(java.util.Collection)} or {@link #withWindowIdentities(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param windowIdentities
  Information about the Maintenance Windows.
  @return Returns a reference to this object so that method calls can be chained together.