}
                    node.addMustSuccessor(it)
                }
                readSuccessorReferences(nodesById) {
                    node.addFinalizingSuccessor(it)
                }
                val lifecycleSuccessors = mutableSetOf<Node>()
                readSuccessorReferences(nodesById) {
                    lifecycleSuccessors.add(it)
                }