type Subprocess = {
    kill: (signal?: number | NodeJS.Signals) => void;
    pid?: number;
    on: (event: "exit", cb: (code: number, signal: string) => void) => void;
    exitCode: number | null;
};
/**
 * Track a subprocess as spawned by this process so they can be all terminated to cleanup tests or similar
 */
export declare const trackSubprocess: (subprocess: Subprocess) => void;
/**
 * Send the signal to all tracked subprocesses and await their exit
 */
export declare const killAllSubprocesses: (signal?: number | NodeJS.Signals) => Promise<void>;
/**
 * Send SIGTERM to all tracked subprocesses and await their exit, then SIGKILL if they don't exit in time
 */
export declare const gracefullyKillAllSubprocesses: () => Promise<void>;
export {};