How to use the elasticmock.behaviour.server_failure.server_failure function in ElasticMock

from elasticsearch import Elasticsearch
from elasticsearch.client.utils import query_params
from elasticsearch.exceptions import NotFoundError

from elasticmock.behaviour.server_failure import server_failure
from elasticmock.utilities import get_random_id, get_random_scroll_id
from elasticmock.utilities.decorator import for_all_methods
from elasticmock.fake_indices import FakeIndicesClient
from elasticmock.fake_cluster import FakeClusterClient

PY3 = sys.version_info[0] == 3
if PY3:
    unicode = str


@for_all_methods([server_failure])
class FakeElasticsearch(Elasticsearch):
    __documents_dict = None

    def __init__(self, hosts=None, transport_class=None, **kwargs):
        self.__documents_dict = {}
        self.__scrolls = {}

    @property
    def indices(self):
        return FakeIndicesClient(self)

    @property
    def cluster(self):
        return FakeClusterClient(self)

    @query_params()