export declare const AdPositionNotYetKnown: unique symbol;
export type AdPosition = (contentDuration: number) => typeof AdPositionNotYetKnown | number;
export declare function isAdPositionKnown(position: typeof AdPositionNotYetKnown | number): position is number;
export declare function resolveAdPosition(position: unknown, contentDuration: number): number | typeof AdPositionNotYetKnown;
export declare function createAdPosition(configuredPosition?: string | number): AdPosition;