export type DeliveryType = "i" | "v";
/**
 * @param {string} [mimeType]
 * @returns {string}
 */
export function extension(mimeType?: string): string;
/**
 * @param {string} extension
 * @returns {string}
 */
export function mimeType(extension: string): string;
/**
 * @param {string} [mimeType]
 * @returns {DeliveryType | false}
 */
export function getDeliveryType(mimeType?: string): DeliveryType | false;
/**
 * @typedef {'i' | 'v'} DeliveryType
 */
/** @type {{ image: 'i', video: 'v' }} */
export const types: {
    image: "i";
    video: "v";
};