execute method

Implementation

@override
SCardResult execute(_PcscContext ctx) {
  final pb = _NativeUtils.allocateBytes(pbAttr);
  try {
    return SCardResult(ctx.winscard.SCardSetAttrib(hCard, dwAttrId, pb.cast<BYTE>(), pbAttr.length));
  } finally {
    calloc.free(pb);
  }
}