import { AppSharedState } from '../state.models';
import { ActionMapLayerSetFeatureKeys } from '../state.models.actions';
/**
 * Reducer to atomically replace all feature keys for a map layer selection.
 *
 * Unlike dispatching MAP_LAYER_ADD_FEATURE_KEY N times (N state updates, N re-renders),
 * this replaces the entire featureKeys array and recalculates colour index pairs in one
 * single state update.
 *
 * @param {AppSharedState} state - The current application state.
 * @param {ActionMapLayerSetFeatureKeys} action - The action containing mapKey, layerKey, featureKeys, and optional customSelectionStyle.
 * @returns {AppSharedState} - Updated state with selection replaced atomically.
 */
export declare const reduceHandlerSetFeatureKeysInSelections: <T extends AppSharedState = AppSharedState>(state: T, action: ActionMapLayerSetFeatureKeys) => T;