import type { ChildProcess } from 'node:child_process';
export interface LaunchedBrowserHandle {
    launchedBrowserProcess: ChildProcess | null;
    launchedBrowserLabel: string;
}
/** Best-effort graceful close of the launched browser, escalating to SIGKILL. */
export declare function closeLaunchedBrowserGracefully(state: LaunchedBrowserHandle, cdpPort: number): Promise<void>;