export declare const MRBD_REQUESTED_WITH_HEADER = "x-requested-with";
export declare const MRBD_SMARTGLASS_BROWSER_REQUESTED_WITH = "com.meta.smartglass.app.browser";
export type MrbdHeaderRecord = Record<string, string | string[] | null | undefined>;
export type MrbdHeadersLike = {
    get: (name: string) => string | null | undefined;
};
export type MrbdRequestLike = {
    headers: MrbdHeaderSource;
};
export type MrbdHeaderSource = MrbdHeadersLike | MrbdHeaderRecord | Iterable<readonly [string, string]> | MrbdRequestLike;
export declare function getMrbdRequestedWithHeader(headers: MrbdHeaderSource): string | null;
export declare function isMetaRayBanDisplayRequest(headers: MrbdHeaderSource): boolean;
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