checkMod9710BBAN function
Check BBAN based on Mod97/10 calculation for countries that support it: BA, ME, MK, PT, RS, SI
@ignore
Implementation
bool checkMod9710BBAN(String bban) {
final String stripped = bban.replaceAll(RegExp(r'[\s.]+'), '');
final int reminder = mod9710(stripped);
return reminder == 1;
}