code: public void setRef(Annotation v) {
      if (ArgumentMention_Type.featOkTst && ((ArgumentMention_Type)jcasType).casFeat_ref == null)
        jcasType.jcas.throwFeatMissing("ref", "de.julielab.jules.types.ArgumentMention");
      jcasType.ll_cas.ll_setRefValue(addr, ((ArgumentMention_Type)jcasType).casFeatCode_ref, jcasType.ll_cas.ll_getFSRef(v));}
docs: setter for ref - sets Reference to the Annotation Object that acts as a argument here
  @generated
  @param v value to set into the feature