import { BackendFeature, ExtensionPoint, ServiceRef, ServiceFactoryOrFunction } from '@backstage/backend-plugin-api';
/**
 * @public
 */
export interface Backend {
    add(feature: BackendFeature | (() => BackendFeature) | Promise<{
        default: BackendFeature | (() => BackendFeature);
    }>): void;
    start(): Promise<void>;
    stop(): Promise<void>;
}
/**
 * @public
 */
export interface CreateSpecializedBackendOptions {
    defaultServiceFactories: ServiceFactoryOrFunction[];
}
/**
 * @public
 */
export type ServiceOrExtensionPoint<T = unknown> = ExtensionPoint<T> | ServiceRef<T>;