call method Null safety
- String? value
Implementation
String? call(String? value) {
String? message;
for (var callback in callbacks) {
message = callback(value);
if (message != null) break;
}
return message;
}
String? call(String? value) {
String? message;
for (var callback in callbacks) {
message = callback(value);
if (message != null) break;
}
return message;
}