from static method
Returns an instance for tag, or null when the tag is not a FeliCa card.
Implementation
static FeliCa? from(NfcTag tag) {
final data = tag.data.felica;
if (data == null) return null;
return FeliCa._(tag.data.handle, currentSystemCode: data.currentSystemCode, currentIDm: data.currentIDm);
}