validatorPhone function
Implementation
bool validatorPhone(value) {
var phone = removeSpecialChars(value);
phone = removeWhiteSpace(phone);
if (allEqual(phone)) return true;
final RegExp re = RegExp(
r'^(?:(?:\+|00)?(55)\s?)?(?:\(?([1-9][0-9])\)?\s?)?(?:((?:9\d|[2-9])\d{3})-?(\d{4}))$');
final bool matches = re.hasMatch(phone);
return !matches;
}