export interface IFetchConfig {
    defaultUrl?: string;
    body?: any;
    cache?: string;
    credentials?: string;
    headers?: Object;
    method?: string;
    mode?: string;
    redirect?: string;
    referrer?: string;
}
export declare class FetchClient {
    private config;
    constructor(config?: IFetchConfig);
    setConfig(config: IFetchConfig): void;
    getConfig(): IFetchConfig;
    fetch(url: string, options: IFetchConfig): Promise<any>;
}