pack method
Implementation
@override
void pack(IsoComponent<Object> component, IsoBuffer buffer) {
final V? data = component.value as V?;
if (data == null) throw StateError("field has no value ($_description)");
if (valueLength(data) > _length) throw ArgumentError("Field length ${valueLength(data)} too long. Max: $_length");
final IsoPadder<V>? currentPadder = padder;
final V paddedData = currentPadder == null ? data : currentPadder.pad(data, _length);
prefixer?.encodeLength(valueLength(paddedData), buffer);
interpreter!.interpret(paddedData, buffer);
}