import type { Marker } from '@edgepdf/types';
/**
 * Detaches a marker from `MarkerManager`'s mutable internal state.
 *
 * `MarkerManager` stores markers in a `Map` and mutates them **in place** —
 * `updateMarker` assigns `marker.icon`, `updateMarkerPosition` assigns
 * `marker.position`/`x`/`y`/`zoom` — while `getAllMarkers()` hands back live
 * references to those same objects.
 *
 * Published markers land in React state and are commonly forwarded straight to
 * a backend. Live references would keep changing underneath consumers — a
 * `useMemo`/`useEffect` keyed on a marker would never re-run, and a payload
 * built during render could be mutated before it is sent. `position` and
 * `icon` are copied too, since both are reassigned wholesale on update.
 */
export declare function cloneMarker(marker: Marker): Marker;
/**
 * True when both lists hold the same markers with the same values.
 *
 * Compared by id rather than by index, so reordering alone is not a change —
 * matching the behaviour of the comparison this replaced.
 *
 * Safe to call with a previously published list because those are clones: a
 * snapshot taken now survives any later in-place mutation of the marker it
 * came from. Comparing against live `getAllMarkers()` results would instead
 * alias the current state and report "unchanged" for every edit.
 */
export declare function markersEqual(a: Marker[], b: Marker[]): boolean;
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