import type { GraphRuntimeUpdate } from '../../../../../types/graphViewRuntime';
/***
 * Detects topology and explicit layout-policy changes independently of highlight metadata.
 * @performance
 * New node/edge array identities alone are not a layout request: consumers may update classes
 * and colors on hover or selection. Keep structural identity separate from presentation and
 * combine this decision with measured geometry in the single runtime owner, not consumer effects.
 */
export declare function hasGraphLayoutChanged(previous: GraphRuntimeUpdate | null, input: GraphRuntimeUpdate): boolean;
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