component/swoole/processpool.php
public static function kill(int $pid, int $signo = SIGTERM): bool
    {
        return SwooleProcess::kill($pid, $signo);
    }
public static function kill(int $pid, int $signo = SIGTERM): bool
    {
        return SwooleProcess::kill($pid, $signo);
    }
@param int $pid
@param int $signo

@return bool