/** Imports an optional engine from the application without installing it. */
export declare function importInstalledEnginePackage<T>(input: {
    readonly appRoot: string;
    readonly packageName: string;
}): Promise<T>;
export declare function resolveInstalledEnginePackageEntrypointHref(input: {
    readonly appRoot: string;
    readonly packageName: string;
}): Promise<string>;