export type GotHeadersGuard = 'immutable' | 'none';
export declare class GotHeaders implements Headers {
    private headers;
    private guard;
    constructor(headers?: Record<string, string | string[] | undefined>, guard?: GotHeadersGuard);
    getSetCookie(): string[];
    private checkGuard;
    append(name: string, value: string): void;
    delete(name: string): void;
    get(name: string): string | null;
    has(name: string): boolean;
    set(name: string, value: string): void;
    forEach(callbackfn: (value: string, key: string, parent: Headers) => void, thisArg?: unknown): void;
    entries(): IterableIterator<[string, string]>;
    keys(): MapIterator<string>;
    values(): Generator<string, void, unknown>;
    [Symbol.iterator](): IterableIterator<[string, string]>;
}
//# sourceMappingURL=headers.d.ts.map