# File lib/fog/network/openstack/models/ike_policy.rb, line 28
        def update
          requires :id, :name, :auth_algorithm, :encryption_algorithm, :ike_version,
                   :lifetime, :pfs, :phase1_negotiation_mode
          merge_attributes(service.update_ike_policy(id, attributes).body['ikepolicy'])
          self
        end