import type { MapAnnotationDescriptor } from "./mapAnnotations";
/**
 * Returns a stable content key for the descriptor so that inline objects with
 * the same logical content do not trigger effect re-runs.
 *
 * For simple descriptors, `onClick` and `icon` are tracked by reference
 * identity so a new click handler or a new icon element causes re-registration,
 * preventing stale-closure bugs.
 *
 * For custom descriptors, the descriptor's own object identity is used so the
 * key changes whenever the render function reference changes (e.g. when
 * isHovered / isSelected state changes).
 */
export declare const getDescriptorContentKey: (descriptor: MapAnnotationDescriptor | null) => string;