def allowed(self, request, datum, cell):
        return True
Fetches a list of all service chain nodes for a tenant.
dataset/ETHPy150Open Havate/havate-openstack/proto-build/gui/horizon/Horizon_GUI/horizon/tables/actions.py/UpdateAction.allowed--crossover with--dataset/ETHPy150Open openstack/python-group-based-policy-client/gbpclient/v2_0/client.py/Client.list_servicechain_nodes