Open APIs

As per the TMF640 specifications and examples provided, possible value for serviceOrderItemStateType = "InProgress" under ServiceOrderItem. But when I created java classes using openAPi yaml file, I got following class. But in V4 its a Enum and It should be Enum in V5 also.

public class ServiceOrderItemStateType {

  private String atType;

  private String atBaseType;

  private String atSchemaLocation;

  private String href;

  private String id;
}

Is this a bug ? Should I convert it in to Enum and make a modifications ? 

Looks wrong to me.  Let me contact the API dev to fix it.

public class ServiceOrderItemStateType {

  private String atType;

  private String atBaseType;

  private String atSchemaLocation;

  private String href;

  private String id;
}