import type { BackendFederationManifest, BackendFederationManifestAdapterOptions } from './types.js';
export declare function resolveBackendFederationManifestReference(options: Pick<BackendFederationManifestAdapterOptions, 'env' | 'manifestEnv' | 'manifestPath' | 'manifestUrl'>): string | undefined;
export declare function withTimeout<T>(promise: Promise<T>, timeoutMs: number | undefined, label: string): Promise<T>;
export declare function loadBackendFederationManifest(options: Pick<BackendFederationManifestAdapterOptions, 'env' | 'expected' | 'fetch' | 'manifest' | 'manifestEnv' | 'manifestPolicy' | 'manifestPath' | 'manifestUrl' | 'signal' | 'timeoutMs'>): Promise<BackendFederationManifest>;