import { MetadataInfo } from '..';
import { Extension } from '../extension/extension';
import { ExtensionGroup } from '../extension_group/extension_group';
declare type Ctor<T> = {
    new (name: string, ...args: unknown[]): T;
    prototype: T;
    onInit: undefined | ((manifest: MetadataInfo, property: MetadataInfo) => void);
    createInstance: (name: string) => T;
    destroyInstance: (instance: T) => void;
};
declare type ExtensionOrExtensionGroup = Extension | ExtensionGroup;
export declare function Addon(name?: string): <T extends Ctor<ExtensionOrExtensionGroup>>(klass: T) => T;
export declare namespace Addon {
    var unload: (name: string) => void;
    var unloadAll: () => void;
    var loaded: () => string[];
    var loadAll: (appRoot: string) => void;
}
export {};