[Turn on line numbering] arg lock; if (type(lock) != 'frob) throw(~perm, "Argument is not a lock."); return (<this(), [lock]>); // Created 27-Mar-1995 as a part of ColdCore, see: @help Credit
arg lock; if (type(lock) != 'frob) throw(~perm, "Argument is not a lock."); return (<this(), [lock]>);