@Override
      public void visitReferenceExpression(@NotNull GrReferenceExpression referenceExpression) {
        super.visitReferenceExpression(referenceExpression);
        final PsiElement resolved = referenceExpression.resolve();
        if (resolved instanceof GrField &&
            manager.areElementsEquivalent(((GrField)resolved).getContainingClass(), clazz) &&
            PsiUtil.isAccessedForWriting(referenceExpression)) {
          usedFields.add((GrField)resolved);
        }
      }
@Override
      public void visitReferenceExpression(@NotNull GrReferenceExpression referenceExpression)