fun addGraph(graph: ControlFlowGraph) {
            for (node in graph.nodes) {
                result.getOrPut(node.fir) { SmartList() }.add(node)

                if (node is CFGNodeWithSubgraphs<*>) {
                    node.subGraphs.forEach(::addGraph)
                }
            }
        }

        addGraph(graphProvider())

        return@lazy result
    }