import { ExternalRouteRef, RouteRef, SubRouteRef } from '../routing';
/**
 * Feature flag configuration.
 *
 * @public
 */
export type FeatureFlagConfig = {
    /** Feature flag name */
    name: string;
};
/** @public */
export type AnyRoutes = {
    [name in string]: RouteRef | SubRouteRef;
};
/** @public */
export type AnyExternalRoutes = {
    [name in string]: ExternalRouteRef;
};
/** @public */
export interface BackstagePlugin<Routes extends AnyRoutes = AnyRoutes, ExternalRoutes extends AnyExternalRoutes = AnyExternalRoutes> {
    readonly $$type: '@backstage/BackstagePlugin';
    readonly id: string;
    readonly routes: Routes;
    readonly externalRoutes: ExternalRoutes;
}
/** @public */
export interface ExtensionOverrides {
    readonly $$type: '@backstage/ExtensionOverrides';
}
/** @public */
export type FrontendFeature = BackstagePlugin | ExtensionOverrides;