import type { SankeyHoverState } from '../types/sankey-hover.js';
/**
 * Compares by reference rather than deeply: a hovered shape holds layout nodes
 * whose `sourceLinks`/`targetLinks` reference back into the whole graph, so a
 * deep comparison would traverse it on every pointer move. Writers only publish
 * a new shape when the hovered identity actually changes.
 */
export declare const useSankeyHoverSelector: <T>(selector: (state: SankeyHoverState) => T) => T;
export declare const useSankeyHoveredShape: () => import("../types/sankey-hover.js").SankeyHoveredShape | undefined;
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