export type TreeSignalOutcome = "sent" | "gone" | "failed";
export declare function supportsProcessGroups(): boolean;
export declare function processAlive(pid: number | undefined): boolean;
export declare function processGroupAlive(processGroupId: number | undefined): boolean;
export declare function terminateProcessTree(pid: number, options: {
    signal: NodeJS.Signals;
    processGroupId?: number | undefined;
}): TreeSignalOutcome;
export declare function hasLiveDescendants(pid: number): Promise<boolean>;