isPhoneNumber static method
Checks if string is phone number.
Implementation
static bool isPhoneNumber(String s) {
if (s.length > 16 || s.length < 9) {
return false;
}
return hasMatch(s, r'^[+]*[(]{0,1}[0-9]{1,4}[)]{0,1}[-\s\./0-9]*$');
}