def METHOD_NAME(cls, name, organisation_pid):
    """Check if the name is unique in organisation.
    :param name: the circulation category name to check.
    :param organisation_pid: the organisation pid to check.
    :return: A ES hit if a circulation category already use thi name in
             the organisation; otherwise, return None.
    """
    item_type = ItemTypesSearch() \
        .filter('term', item_type_name=name) \
        .filter('term', organisation__pid=organisation_pid)\
        .source().scan()
    try:
        return next(item_type)
    except StopIteration:
        return None