copyWith method
Implementation
Chain copyWith() {
final c = Chain();
c._preValidators = _preValidators?.copyWith();
c._postValidators = _postValidators?.copyWith();
c._coercion = _coercion;
c._coercionKind = _coercionKind;
c._prefix = _prefix;
c._preservePreValidators = _preservePreValidators;
return c;
}