import type { PoolObserver, PoolObserverOperation } from "../../browser-pool/types";
import type { ProfilerRuntimeLike } from "../runtime/types";
export declare class ProfilerPoolObserver implements PoolObserver {
    private readonly _runtime;
    private readonly _peaks;
    constructor(_runtime: ProfilerRuntimeLike);
    start(kind: string, data: Record<string, string | number | boolean | null>): PoolObserverOperation;
    record(event: string, data: Record<string, string | number | boolean | null>): void;
}