combine static method

Validator combine(
  1. List<Validator> validators
)

Composite: combine multiple validators; returns first non-null error message.

Implementation

static Validator combine(List<Validator> validators) {
  return (String? value) {
    for (final v in validators) {
      final res = v(value);
      if (res != null) return res;
    }
    return null;
  };
}