Good thing they made it final

    //This is all in a test

        final String nullString = null;

    // ...

        final Activity act = new Activity();

    // ...

        act2.setReading(nullString);
        act2.setEditing(nullString);

    // ...

        final WorkItemState actual = EntityConversion.toWorkItemState(workitemId, comboList, nullString,
                null, nullString, comboListObject);