public void addIssue(int reason,EObject obj,int featureId,String detail){
  issues.add(new TransformationIssue(reason,obj,featureId,detail));
}

public void addIssue ( int reason , EObject obj , int featureId , String detail ) { issues . add ( new TransformationIssue ( reason , obj , featureId , detail ) ) ; }
add an issue during transformation . duplicate issues will be detected and stored only once . this is typically called by the specific transformation subclass .
