/**
 * Custom decorator to extract the JWT token from the request headers.
 *
 * This decorator is designed to be used in route handlers where access to the raw JWT token is required.
 * It expects the token to be present in the 'Authorization' header using the standard 'Bearer <token>' format.
 *
 * If the header is not found, it throws an UnprocessableEntityException, signaling an invalid or incomplete request.
 *
 * @throws {UnprocessableEntityException} When the 'Authorization' header is missing.
 * @returns {string} The extracted JWT token without the 'Bearer ' prefix.
 */
export declare const Jwt: (...dataOrPipes: any[]) => ParameterDecorator;