import type { State } from "../state/state.js";
import type { ChildTrait } from "../traits/child.js";
import { Command, Targets } from "../command.js";
export declare class ChangeIdx extends Command {
    private index;
    private entities;
    /**
     * History of card movement:
     * [index before execution, index after]
     */
    private sources;
    constructor(entities: Targets<ChildTrait>, index: number);
    execute(state: State): Promise<void>;
    undo(state: State): Promise<void>;
}