isUUID static method
check field is a valid uuid
Implementation
static bool isUUID(Map<String, dynamic> data, dynamic value, String args) {
RegExp uuidRegex = RegExp(
r'^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$');
return uuidRegex.hasMatch(value.toString());
}