Append a :class:`BumpSequence <stellar_base.operation.BumpSequence>`
        operation to the list of operations.

        Only available in protocol version 10 and above

        :param int bump_to: Sequence number to bump to.
        :param str source: The source address that is running the inflation
            operation.
        :return: This builder instance.

def append_bump_sequence_op(self, bump_to, source=None):
        """Append a :class:`BumpSequence <stellar_base.operation.BumpSequence>`
        operation to the list of operations.

        Only available in protocol version 10 and above

        :param int bump_to: Sequence number to bump to.
        :param str source: The source address that is running the inflation
            operation.
        :return: This builder instance.

        """
        op = operation.BumpSequence(bump_to, source)
        return self.append_op(op)