@Override public void visitReferenceExpression(@NotNull PsiReferenceExpression expression) {
      final PsiExpression qualifierExpression = expression.getQualifierExpression();
      if (qualifierExpression != null
              && !(qualifierExpression instanceof PsiThisExpression)) {
        return;
      }
      final PsiElement resolved = expression.resolve();
      if (resolved instanceof PsiParameter) {
        myUsedParameters.add((PsiParameter)resolved);
      } else if (myMovedFields.contains(resolved)) {
        myUsedFields.add((PsiField)resolved);
      }
    }
@Override public void visitReferenceExpression(@NotNull PsiReferenceExpression expression)