/**
 * Reduce number of nodes in the graph by collapsing edges and joining neighbouring nodes
 * Simplifies a graph, reducing number of edges and nodes
 * @template T
 * @param {Graph<MultiNode<T>>} graph
 * @param {number} max_node_limit Maximum number of "source" nodes per joined node
 */
export function mn_graph_coarsen<T>(graph: Graph<MultiNode<T>>, max_node_limit: number): void;
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