type RequestHeader = Record<string, string>;
export declare function GetRequestHeader(contentType?: string | null, Accept?: string): Promise<RequestHeader>;
export declare function GetRequestHeaderWithAuthorization(contentType?: string | null, token?: string, Accept?: string): Promise<RequestHeader>;
export declare function GetOnlyTokenHeader(): Promise<Headers>;
export declare function fetchWithAuthRetry(input: RequestInfo | URL, init?: RequestInit): Promise<Response>;
export declare function getValidAccessToken(token?: string): Promise<string>;
export {};