partial void VestigialCustomParse(OverlayStream stream, int offset)
{
var subMeta = stream.ReadSubrecord();
if (subMeta.ContentLength != 1)
{
throw new ArgumentException($"Unexpected length: {subMeta.ContentLength}");
}
if (stream.ReadUInt8() > 0)
{
this._vestigialMarker = true;
}
}