import type { Entity } from "../../core/Entity";
import { System } from "../../core/System";
import { Selected } from "../components/Selected";
declare type SelectedEntity = Entity & {
    __selected: true;
};
export declare class SelectedSystem extends System {
    static components: (typeof Selected)[];
    readonly pure = true;
    data: WeakMap<Entity, Selected>;
    constructor();
    test(entity: Entity): entity is SelectedEntity;
    onAddEntity(entity: Entity): void;
    onRemoveEntity(entity: Entity): void;
    get selection(): ReadonlyArray<Entity>;
    select(entity: Entity): boolean;
    setSelection(entities: ReadonlyArray<Entity>): void;
}
export {};