jsonschema2pojo is adding some attribute to parent class dynamically

Question

I have a json schema like this:

{
  "JavaType:"com.a.b.c.MyClass",
  "extends": {
    "type": "object",
    "javaType": "com.a.b.MyBaseClass"
  }
}

After build is executed jsonschema2pojo is adding some attribute & setter/getter dynamically to MyBaseClass class. Is there a way we can stop this run time modification to this class? I just want this MyBaseClass to have nothing just a symbolic class.