/**
 * Manages the browser-style isolation history for FlameChart / FlameGraph.
 *
 * The stack is stored as an ordered list of span ids and a cursor. Isolating
 * from a non-tail cursor discards the forward entries and starts a new branch
 * from the current level — mirroring how a browser's history rewrites forward
 * pages when you follow a new link after going back.
 * @internal
 */
export type FlameIsolationState = {
    /**
     * Id of the currently isolated span, or `undefined` when the full dataset is displayed.
     */
    isolatedId: unknown;
    /**
     * Push a new isolation level. Truncates any forward history first.
     */
    isolate: (id: unknown) => void;
    /**
     * Move one level toward the original root. No-op when already at the root.
     */
    goBack: () => void;
    /**
     * Re-advance one level along the previously taken path. No-op at the tail.
     */
    goForward: () => void;
    canGoBack: boolean;
    canGoForward: boolean;
};
/**
 * @internal
 */
export declare function useFlameIsolationState(): FlameIsolationState;
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