validateUpiId static method
Implementation
static String? validateUpiId({@required String? upiId}) {
final RegExp regex = RegExp(validUpiIdPattern.toString());
if (upiId!.isEmpty) {
return StringConstants.upi_empty_msg;
} else if (!regex.hasMatch(upiId)) {
return StringConstants.valid_upi_msg;
}
return null;
}