import { type Graph, type Link } from './types.js';
import { type Hash } from 'util/index.js';
/** Returns true if `a` is a predecessor of `b` */
export declare const isPredecessor: (graph: Graph<any, any>, a: Link<any, any>, b: Link<any, any>) => boolean;
/** Returns true if `a` is a predecessor of `b` */
export declare const isPredecessorHash: (graph: Graph<any, any>, a: Hash, b: Hash) => boolean;
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