public static PsiQualifiedReferenceElement findReferenceToClass(PsiReferenceList refList, PsiClass aClass) {
    PsiQualifiedReferenceElement[] refs = refList instanceof GrReferenceList ? ((GrReferenceList)refList).getReferenceElementsGroovy()
                                                                             : refList.getReferenceElements();

    for (PsiQualifiedReferenceElement ref : refs) {
      if (ref.isReferenceTo(aClass)) {
        return ref;
      }
    }

    return null;
  }
public static PsiQualifiedReferenceElement findReferenceToClass(PsiReferenceList refList, PsiClass aClass)