import { Serializable } from "@langchain/core/load/serializable";
/**
 * Base class for all entity stores. All entity stores should extend this
 * class.
 */
export declare abstract class BaseEntityStore extends Serializable {
    abstract get(key: string, defaultValue?: string): Promise<string | undefined>;
    abstract set(key: string, value?: string): Promise<void>;
    abstract delete(key: string): Promise<void>;
    abstract exists(key: string): Promise<boolean>;
    abstract clear(): Promise<void>;
}