@Nullable
    private static PsiReferenceExpression getReferenceFromNullCheck(PsiBinaryExpression expression) {
      PsiExpression comparedWithNull = ExpressionUtils.getValueComparedWithNull(expression);
      return tryCast(PsiUtil.skipParenthesizedExprDown(comparedWithNull), PsiReferenceExpression.class);
    }
@Nullable
    private static PsiReferenceExpression getReferenceFromNullCheck(PsiBinaryExpression expression)