/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
import { AgentState, TurnContext } from '@microsoft/agents-hosting';
/**
 * A collection of `AgentState` plugins that should be loaded or saved in parallel as a single unit.
 *
 * @remarks
 * See `AutoSaveStateMiddleware` for an implementation of this class.
 */
export declare class AgentStateSet {
    /**
      * Array of the sets `AgentState` plugins.
      */
    readonly agentStates: AgentState[];
    /**
      * Creates a new AgentStateSet instance.
      *
      * @param agentStates One or more AgentState plugins to register.
      */
    constructor(...agentStates: AgentState[]);
    /**
      * Registers one or more `AgentState` plugins with the set.
      *
      * @param agentStates One or more AgentState plugins to register.
      * @returns The updated AgentStateSet.
      */
    add(...agentStates: AgentState[]): this;
    /**
      * Calls the {@link AgentState.load | AgentState.load method} on all of the AgentState plugins in the set.
      *
      * @param context Context for current turn of conversation with the user.
      * @param force (Optional) If `true` the cache will be bypassed and the state will always be read in directly from storage. Defaults to `false`.
      *
      * @remarks
      * This will trigger all of the plugins to read in their state in parallel.
      *
      */
    loadAll(context: TurnContext, force?: boolean): Promise<void>;
    /**
      * Calls {@link AgentState.saveChanges | AgentState.saveChanges method} on all of the AgentState plugins in the set.
      *
      * @param context Context for current turn of conversation with the user.
      * @param force (Optional) if `true` the state will always be written out regardless of its change state. Defaults to `false`.
      *
      * @remarks
      * This will trigger all of the plugins to write out their state in parallel.
      */
    saveAllChanges(context: TurnContext, force?: boolean): Promise<void>;
}