import { KVMap, Label, RawMap } from './map';
export declare class Header extends KVMap {
    static fromBytes(data: Uint8Array): Header;
    constructor(kv?: RawMap);
    toBytes(): Uint8Array;
}
export declare function verifyHeaders(protectedHeader: Header, unprotectedHeader: Header, understoodCriticalLabels?: Iterable<Label>): Label[];