import { GraphNode } from '../graphs/graph-node';
/**
 * Perform a topological sort on a directed graph using Kahn's algorithm.
 *
 * Time complexity: O(V+E)
 * Space complexity: O(V)
 *
 * @param {Map<GraphNode<T>, Array<GraphNode<T>>} graph
 * @return {Array<GraphNode<T>>}
 */
export declare const topologicalSortKahn: <T>(graph: Map<GraphNode<T>, GraphNode<T>[]>) => T[];
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