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as exit code without anything return

=head2 status

    if (my $runned = $g->status) {
        say "Running $runned";
    } else {
        say "Not running";
    }

This method checks the status of running daemon and returns its PID (alive).
The method returns 0 if it is not running (dead).

=head2 stop

    if (my $runned = $g->stop) {
        if ($runned < 0) {
            die "Daemon " . $g->pid ." is still running";
        } else {
            say "Stopped $runned";
        }