Isn't FindAllPagesWithCriteria or FindPagesWithCriteria suppose to work on properties inside a Page block or a Global block?

var repository = ServiceLocator.Current.GetInstance();

            PropertyCriteriaCollection criterias = new PropertyCriteriaCollection();

                criterias.Add(new PropertyCriteria()
                {
                    Condition = CompareCondition.Equal,
                    Required = false,
                    Name = "Heading",
                    Type = PropertyDataType.String,
                    Value = "My heading"
                });


            PageDataCollection result = repository.FindAllPagesWithCriteria(ContentReference.StartPage, criterias,"sv",new LanguageSelector("sv"));