import type { ActionsUnion, IGatsbyState } from "../types";
export declare const adapterReducer: (state: {
    instance?: import("../../utils/adapter/types").IAdapter | undefined;
    manager: import("../../utils/adapter/types").IAdapterManager;
    config: import("../../utils/adapter/types").IAdapterFinalConfig;
} | undefined, action: ActionsUnion) => IGatsbyState["adapter"];