setValidations method
Implementation
void setValidations(String number) {
if (cont == null) {
validation = 'Please choose country';
formKey.currentState?.reset();
} else if (number.isEmpty) {
validation = 'Please enter phone number';
} else if (number.length < (phoneLength ?? 0)) {
validation = 'Please enter valid phone number';
} else {
validation = null;
}
phoneNumber = number.isNotEmpty ? int.parse(number) : phoneNumber;
notifyListeners();
}