/// <exception cref="System.InvalidOperationException"></exception>
/// <exception cref="System.IO.IOException"></exception>
public override void PrescanTwoTrees(Tree head, Tree merge)
{
DirCache dc = db.LockDirCache();
try
{
dco = new DirCacheCheckout(db, head.GetTreeId(), dc, merge.GetTreeId());
dco.PreScanTwoTrees();
}
finally
{
dc.Unlock();
}
}
