/**
 *
 * Directed acyclic graph tracking PR duplication lineage
 *
 * ensures original authorship is preserved
 */
export declare class AttributionGraph {
    private parent;
    private children;
    /**
     * record that duplicatedPRId is derived from originalPRId
     */
    addEdge(duplicatedPrId: number, originalPrId: number): void;
    /**
     * returns the root/original pr in the lineage
     */
    getOriginal(prId: number): number;
    /**
     * returns all transitive duplicates of a PR
     */
    getAllDuplicates(prId: number): number[];
}
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