Get a list of output links filtered on some criteria

        Args:
            owner (str): base58 encoded public_key.
            spent (bool): If ``True`` return only the spent outputs. If
                          ``False`` return only unspent outputs. If spent is
                          not specified (``None``) return all outputs.

        Returns:
            :obj:`list` of TransactionLink: list of ``txid`` s and ``output`` s
            pointing to another transaction's condition

def get_outputs_filtered(self, owner, spent=None):
        """Get a list of output links filtered on some criteria

        Args:
            owner (str): base58 encoded public_key.
            spent (bool): If ``True`` return only the spent outputs. If
                          ``False`` return only unspent outputs. If spent is
                          not specified (``None``) return all outputs.

        Returns:
            :obj:`list` of TransactionLink: list of ``txid`` s and ``output`` s
            pointing to another transaction's condition
        """
        outputs = self.fastquery.get_outputs_by_public_key(owner)
        if spent is None:
            return outputs
        elif spent is True:
            return self.fastquery.filter_unspent_outputs(outputs)
        elif spent is False:
            return self.fastquery.filter_spent_outputs(outputs)