export declare const fetchRetailJSON: <R>(url: string, method: 'POST' | 'GET' | 'PUT', body?: any) => Promise<R | null>;
export declare function doRequest(url: string, method: 'POST' | 'GET' | 'PUT', body?: any): Promise<Response>;
export declare const getAuthorizationHeaders: () => {
    Authorization: string;
} | null;