convertFiltersToLowerCase method
Implementation
GroupFilterExp? convertFiltersToLowerCase(GroupFilterExp? filter) {
if (filter != null) {
for (var group in filter.filterExps) {
if (group is GroupFilterExp) {
group = convertFiltersToLowerCase(group)!;
} else if (group is FilterExpColumn) {
if (group.value is String) {
group.value = group.value.toString().toLowerCase();
}
}
}
}
return filter;
}