Make CSVImportStatus operation result serializable as CSVImportStatus by the Java client

String workId = client.operation(CSVImportOperation.ID)
                            .param(...)
                            .input(...)
                            .execute();
CSVImportStatus workStatus = client.operation(CSVImportStatusOperation.ID).input(workId).execute();

public static class CSVImportStatusJSONObject extends Entity {

    public static final String ENTITY_TYPE = "org.nuxeo.ecm.csv.core.CSVImportStatus";

    public CSVImportStatusJSONObject() {
        super(ENTITY_TYPE);
    }

    public CSVImportStatusWithConstructor getValue() {
        return value;
    }

    public void setValue(CSVImportStatusWithConstructor value) {
        this.value = value;
    }

    CSVImportStatusWithConstructor value;
}

public static class CSVImportStatusWithConstructor extends CSVImportStatus {

    @JsonCreator
    public CSVImportStatusWithConstructor(@JsonProperty("state") State state) {
        super(state);
    }
}

NuxeoClient client = new NuxeoClient.Builder().registerEntity(CSVImportStatusJSONObject.ENTITY_TYPE, CSVImportStatusJSONObject.class).connect();
String workId = client.operation(CSVImportOperation.ID) .param(...) .input(...) .execute();
CSVImportStatus workStatus = client.operation(CSVImportStatusOperation.ID)
                                       .input(workId).<CSVImportStatusJSONObject>execute().value;