import type { Attributes, AttributeValue } from "@opentelemetry/api";
/**
 * Accumulates attributes for the wide event of the current request.
 *
 * All methods are no-ops when called outside a request handled by the
 * WideEventInterceptor.
 *
 * @publicApi
 */
export declare class WideEventService {
    /**
     * Set a single attribute on the current wide event.
     */
    set(key: string, value: AttributeValue): void;
    /**
     * Set multiple attributes on the current wide event.
     */
    setMany(attributes: Attributes): void;
    /**
     * Increment a numeric attribute on the current wide event.
     * Starts from 0 when the attribute is absent or not a number.
     */
    increment(key: string, by?: number): void;
    /**
     * Start a timer for the given attribute. The returned function stops
     * the timer and records the elapsed time in milliseconds.
     */
    startTimer(key: string): () => void;
}