Method add

dns/btree.py:845–847

(self, value: KT)

        return self.get_element(key) is not None

    def add(self, value: KT) -> None:
        elt = Member(value)
        self.insert_element(elt, self.in_order)

    def discard(self, value: KT) -> None:
        self.delete_key(value)