import { MaybeRefOrGetter, Ref } from 'vue';
import { BehaviorClass } from '@skewedaspect/sage';
import { GameEntityView, ViewNarrowedTo } from "./useSageEntity.js";
/**
 * Answers with a view for each entity carrying the tag, whatever its class, in the order the simulation
 * holds them. A view stays the same object for as long as its entity is in the collection, so a `v-for`
 * keyed by `id` reuses its components (design/ui.md#gameentityview).
 *
 * @param tag - The tag, read on every refresh, so a `Ref` or a getter gathers the entities carrying the tag
 *     it names at that moment and a null tag gathers nothing (design/ui.md#which-entity-a-view-holds).
 * @param behaviorClass - Narrows the collection to the entities holding it, typed to its state and operations.
 */
export declare function useSageEntities(tag: MaybeRefOrGetter<string | null>): Ref<readonly GameEntityView[]>;
export declare function useSageEntities<Class extends BehaviorClass>(tag: MaybeRefOrGetter<string | null>, behaviorClass: Class): Ref<readonly ViewNarrowedTo<Class>[]>;