parent $utility_objects object $network var $root dbref 'network var $root child_index 0 var $root fertile 0 var $root manager $network var $root owned [$network] var $root owners [$network] var $root writable [] var $root readable ['parameters, 'methods, 'code] var $root inited 1 var $network valid_slate_callers [$] method valid_slate_callers return valid_slate_callers; . method add_slate_caller arg obj; (> .perms(sender(), 'manager) <); valid_slate_callers = setadd(valid_slate_callers, obj); . method del_slate_caller arg obj; (> .perms(sender(), 'manager) <); valid_slate_callers = setremove(valid_slate_callers, obj); .