import { SuperClusterViewportAlgorithm, type AlgorithmInput, type AlgorithmOutput } from "@googlemaps/markerclusterer";
/**
 * Wrapper around SuperClusterViewportAlgorithm that handles empty marker arrays.
 *
 * Stopgap for upstream issue googlemaps/js-markerclusterer#1129.
 * The fix from PR #1014 was only applied to SuperClusterAlgorithm, not
 * SuperClusterViewportAlgorithm. This wrapper adds the same empty markers check.
 *
 * @see https://github.com/googlemaps/js-markerclusterer/issues/1129
 * @see https://github.com/googlemaps/js-markerclusterer/pull/1130
 *
 * TODO: Remove once upstream PR #1130 is released.
 */
export declare class SafeSuperClusterViewportAlgorithm extends SuperClusterViewportAlgorithm {
    calculate(input: AlgorithmInput): AlgorithmOutput;
}