static public Nook GetChangeNook(this NookSystem item, string path, Nook src_nook)
{
Nook dst_nook = item.GetNook(path);
if (src_nook != null && src_nook.IsPresent())
{
src_nook.MoveTo(dst_nook);
}
return(dst_nook);
}
static public IEnumerable <Nook> GetNooks(this NookSystem item, string path)
{
return(item.GetPaths(path)
.Convert(p => item.GetNook(p)));
}