import { AppSharedState } from '../state.models';
import { ActionMapLayerSetBulkSelection } from '../state.models.actions';
/**
 * Reducer handler for MAP_LAYER_SET_BULK_SELECTION.
 *
 * Atomically writes a named selection entry into state.selections.
 * Unlike MAP_LAYER_SET_FEATURE_KEYS, this handler works by selectionKey directly
 * (no mapKey/layerKey lookup required) and gives the caller explicit control over
 * whether features share one colour or each receive a distinct cycling colour index.
 *
 * @param state   - Current application state.
 * @param action  - Action with selectionKey, featureKeys, distinctColours, and optional distinctItems.
 * @returns Updated state with the selection entry created or replaced.
 */
export declare const reduceHandlerSetBulkSelection: <T extends AppSharedState = AppSharedState>(state: T, action: ActionMapLayerSetBulkSelection) => T;