import { type NestMiddleware } from "@nestjs/common";
/**
 * Captures the span active at the start of the request (the HTTP server /
 * local-root span, before Nest instrumentation nests guard/interceptor/handler
 * spans) and stashes it on the request so the WideEventInterceptor can flush
 * accumulated attributes onto the root span rather than a nested child.
 *
 * Applied automatically by the OpenTelemetry module for HTTP apps.
 *
 * @publicApi
 */
export declare class WideEventMiddleware implements NestMiddleware {
    use(req: Record<symbol, unknown>, _res: unknown, next: (error?: unknown) => void): void;
}