removeAllNumbers method
Implementation
String removeAllNumbers({List<String> include = const []}) {
final List<String> invalid = kNumbersString.toList()..addAll(include);
final StringBuffer buffer = StringBuffer();
for (int i = 0; i < length; i++) {
final String character = this[i];
if (!invalid.contains(character)) buffer.write(character);
}
return buffer.toString();
}