Funcionalidade de pesquisa Dart

   storeListFilterForSearch.addAll(storeListWithItsSubcategories
        .where((u) => (u.subCategoryName
                .toString()
                 .toLowerCase()
               .contains(listValueToSearch.toLowerCase()) ||
           u.subCategoryName
               .toString()
              .toLowerCase()
                .contains(listValueToSearch.toLowerCase())))
       .toList());
Evil Elephant