[Turn on line numbering]arg who; if (this() in sender().parents()) throw(~perm, sender() + " already has " + this() + " as a parent."); if (!.has_flag('fertile, sender()) && !.trusts(who)) throw(~perm, this() + " refuses to be parent of " + sender() + ".");
["// Created as a part of ColdCore, see: @help Credit"]