import { AxiosInstance, AxiosRequestConfig, AxiosResponse } from "axios";
import { CalloutMiddleware, CalloutState } from "./types.js";
export declare class Callout<Params extends any[], ResponseType> {
    private readonly _axiosInstance;
    private readonly _configFunction;
    private readonly _state;
    private readonly _middlewares;
    private _message;
    get getState(): CalloutState;
    get isLoading(): boolean;
    get getMessage(): string | null | undefined;
    get getConfigFunction(): (...params: Params) => AxiosRequestConfig;
    constructor(configFunction: () => AxiosRequestConfig, axiosInstance?: AxiosInstance | null);
    setMessage(message: string | undefined): this;
    invoke(...params: Params): Promise<AxiosResponse<ResponseType>>;
    addMiddleware(...middleware: Array<CalloutMiddleware<Params, ResponseType>>): void;
    removeMiddleware(middleware: CalloutMiddleware<Params, ResponseType>): void;
    private _getAxiosInstance;
    private _invokeStart;
    private _invokeEnd;
    private _invokeMiddlewares;
}