import { Conversation } from "./Conversation.js";
import { Actor } from "./Actor.js";
/**
 * A scheduler is used to determine which actor should speak next in a
 * conversation.
 */
export declare class Scheduler {
    /** The conversation that the scheduler is used in. */
    readonly conversation: Conversation;
    /**
     * Create a new scheduler.
     * @param conversation The conversation that the scheduler is used in.
     */
    constructor(conversation: Conversation);
    /**
     * Get the next actor that should speak in the conversation.
     */
    getNextSpeaker(): Actor;
    /**
     * Transform the scheduler into a JSON-serializable object.
     */
    toJSON(): void;
}
/**
 * A scheduler that selects the next actor in the conversation. The order of the
 * actors is determined by the order in which they were added to the
 * conversation.
 */
export declare class RoundRobinScheduler extends Scheduler {
    /** The index of the last actor that spoke. */
    private lastIndex;
    getNextSpeaker(): Actor;
    toJSON(): {
        type: string;
        lastIndex: number;
    };
}