Subclasses don't get constructors

[berntie]

I have the following struct:

typedef struct JnaExport
{
    int AftrNr;
    int KndNr;
    int ObjectVersion;

    char* JsonData;
    tOutputStatus OutputStatus;
} AuftragskopfOutputDtoJna;

with tOutputStatus being

enum tOutputStatus
{
    OUTPUTSTATUS_OK_WITH_DATA = 100,
    OUTPUTSTATUS_ERROR_NOT_FOUND = -404, //
        // ... many more
};

From that JNAerator generates the following Java class:

public class AuftragskopfOutputDtoJna extends Structure {
    public int AftrNr;
    public int KndNr;
    public int ObjectVersion;
    public Pointer JsonData;
    public int OutputStatus;

    public AuftragskopfOutputDtoJna() {
        super();
    }

    protected List<? > getFieldOrder() {
        return Arrays.asList("AftrNr", "KndNr", "ObjectVersion", "JsonData", "OutputStatus");
    }

    public AuftragskopfOutputDtoJna(int AftrNr, int KndNr, int ObjectVersion, Pointer JsonData, int OutputStatus) {
        super();
        this.AftrNr = AftrNr;
        this.KndNr = KndNr;
        this.ObjectVersion = ObjectVersion;
        this.JsonData = JsonData;
        this.OutputStatus = OutputStatus;
    }

    public AuftragskopfOutputDtoJna(Pointer peer) {
        super(peer);
    }

    public static class ByReference extends AuftragskopfOutputDtoJna implements Structure.ByReference {
    };
    public static class ByValue extends AuftragskopfOutputDtoJna implements Structure.ByValue {
    };
}

The documentation says "JNAerated structs all get ByReference and ByValue subclasses (that have a struct-pointer-copy constructor)" but my subclasses don't get that constructor. That's annoying because I don't know how to obtain a AuftragskopfOutputDtoJna.ByReference without that constructor and I'm thus forced to rely on a deprecated method for freeing memory:

    /**
     * ...
     * @deprecated use the safer method {@link #deleteAuftragskopfOutputDto(AuftragskopfOutputDtoJna.ByReference[])} instead
     */
    @Deprecated 
    void deleteAuftragskopfOutputDto(PointerByReference dto);

How am I supposed to fix this? And could someone update the documentation, please.