def METHOD_NAME(cls, source):
    """Get record by online harvested source.
    :param source: the record source
    :return: Organisation record or None.
    """
    results = OrganisationsSearch().filter(
        'term', online_harvested_source=source).scan()
    try:
        return Organisation.get_record_by_pid(next(results).pid)
    except StopIteration:
        return None