import { BaseService, type BaseServiceConstructor } from "../index.js";
/**
 * Built-in decorator that marks the content type of a response.
 * @param contentType The content type of the response, like 'application/pdf' or 'text/plain'.
 * @example ```ts
 * class pdfService extends Service {
 * 	@ContentType("application/pdf")
 * 	function getPdf() {
 * 		// return a pdf as ArrayBuffer or UInt8Array
 * 	}
 * }
 * ```
 */
export declare function ContentType(contentType: string): (serviceInstance: BaseService | BaseServiceConstructor, property?: string) => void;
/**
 * @returns the content type of the given service and path, if any.
 */
export declare function getContentType(service: BaseServiceConstructor, property: string | undefined): string | undefined;