import type { SankeyLayoutLink, SankeyLayoutNode } from '../types/sankey-internal.js';
type LinkEndpoint = SankeyLayoutLink['source'];
/**
 * After the layout pass d3-sankey replaces the `source`/`target` ids with the
 * node objects themselves, but the vendored types still allow the id form.
 */
export declare const isResolvedNode: (endpoint: LinkEndpoint) => endpoint is SankeyLayoutNode;
export {};
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