/**
 * Fetch headers.
 */
export default interface IHeaders extends Iterable<[string, string]> {
    forEach(callback: (value: string, name: string) => void): void;
    append(name: string, value: string): void;
    delete(name: string): void;
    get(name: string): string | null;
    has(name: string): boolean;
    raw(): {
        [k: string]: string[];
    };
    set(name: string, value: string): void;
    entries(): IterableIterator<[string, string]>;
    keys(): IterableIterator<string>;
    values(): IterableIterator<string>;
    [Symbol.iterator](): Iterator<[string, string]>;
}