interface ResolveOptionalModuleOptions<T> {
    accessor?: (module: any) => T | null | undefined;
    devWarning?: string;
    loader?: () => any;
}
/**
 * Attempts to synchronously resolve an optional dependency while caching the result.
 * Returns `null` when the module cannot be loaded. An optional accessor can pull
 * a specific export off the module evaluation.
 */
export declare function resolveOptionalModule<T = any>(moduleId: string, options?: ResolveOptionalModuleOptions<T>): T | null;
/**
 * Clears the cached optional module entries. Useful for tests to re-attempt loads.
 */
export declare function resetOptionalModuleCache(): void;
export {};