private static void CopyOverHeader(RecordLocatorResults fileLocs, IMutagenReadStream inputStream, BinaryWriter writer)
{
long noRecordLength;
if (fileLocs.GrupLocations.TryGetInDirection(
inputStream.Position,
higher: true,
result: out var nextRec))
{
noRecordLength = nextRec.Value.Location.Min - inputStream.Position;
}
else
{
noRecordLength = inputStream.Remaining;
}
inputStream.WriteTo(writer.BaseStream, (int)noRecordLength);
}
