def get_metadata(connection, transaction_ids):
    """Get a list of metadata from the metadata table.

    Args:
        transaction_ids (list): a list of ids for the metadata to be retrieved from
        the database.

    Returns:
        metadata (list): the list of returned metadata.
    """
    raise NotImplementedError
Get a list of metadata from the metadata table.

Args:
transaction_ids (list): a list of ids for the metadata to be retrieved from
the database.

Returns:
metadata (list): the list of returned metadata.
bigchaindb/backend/query.py