private FailureDetectorStub Fd(ClusterHeartbeatSenderState state, UniqueAddress node)
 {
     return
         state.FailureDetector.AsInstanceOf<DefaultFailureDetectorRegistry<Address>>()
             .GetFailureDetector(node.Address)
             .AsInstanceOf<FailureDetectorStub>();
 }
 private FailureDetectorStub Fd(ClusterHeartbeatSenderState state, UniqueAddress node)
 {
     return
         (state.FailureDetector.AsInstanceOf <DefaultFailureDetectorRegistry <Address> >()
          .GetFailureDetector(node.Address)
          .AsInstanceOf <FailureDetectorStub>());
 }