/**
 * Turns the fire-and-forget inspector channel into request/response for the
 * node side. The page answers a `tree` command with a `tree` message and a
 * `details` command with `details` or `gone`, but nothing correlates them, so
 * this resolves every waiter for that kind on the next matching message.
 * Bounded by a timeout: the null source never answers, and a page may be gone.
 */
import type { InspectorCommand, InspectorDetails, InspectorMessage, InspectorTreeNode } from '../../types/inspector.js';
import type { TimelineSource } from './source.js';
export interface InspectorRequester {
    /** Ask the page for its tree; `undefined` when nothing answered in time. */
    tree(timeoutMs: number): Promise<InspectorTreeNode[] | undefined>;
    /**
     * Ask the page for one element's details. `null` when the page reports it
     * gone; `undefined` when nothing answered in time. `command` replaces the
     * plain `details` ask with another one the page answers the same way,
     * such as `set-prop`.
     */
    details(id: number, timeoutMs: number, command?: InspectorCommand): Promise<InspectorDetails | null | undefined>;
    /** Feed every inbound page message through here before the cache sees it. */
    resolve(message: InspectorMessage): void;
}
export declare const createInspectorRequester: (source: Pick<TimelineSource, 'sendInspector'>) => InspectorRequester;
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