isSSN method
Check if the string is a valid SSN string.
Implementation
bool isSSN(String value) {
final String ssn = value.replaceAll('-', '').replaceAll(' ', '');
if (ssn.length != 9) {
return false;
}
return regex == _ssn
? regex.hasMatch(value) || _ssnCleaned.hasMatch(ssn)
: regex.hasMatch(value) || regex.hasMatch(ssn);
}