(self, item)
return True
This has no effect and would return False if the item is not equal to
        privileged and already present. Otherwise, it will adds the item and
        returns True.
This has no effect and would return False if the item is not equal to
        privileged and already present. Otherwise, it will adds the item and
        returns True.
This has no effect and would return False if the item is not equal to privileged and already present . Otherwise it will adds the item and returns True .
def add(self, item) -> bool:
        """This has no effect and would return False if the item is not equal to
        privileged and already present. Otherwise, it will adds the item and
        returns True."""
        if item != self._privileged and item in self._set:
            return False
        self._set.add(item)
        self._array.append(item)
        return True
def add ( self , item ) -> bool : if item != self . _privileged and item in self . _set : return False self . _set . add ( item ) self . _array . append ( item ) return True