In ChildProcess::spawn, $child->on('fork',xxx(){}) is called after $this->parallel

[lubobill1990]

$child->on('fork', function () use (&$files, $child, $types, $self)
https://github.com/hfcorriez/php-childprocess/blob/master/lib/Pagon/ChildProcess.php#L243
is called after
$child = $this->parallel(function ($process) use ($cmd, $files) {
https://github.com/hfcorriez/php-childprocess/blob/master/lib/Pagon/ChildProcess.php#L218

but, $child->emit('fork'); is called in parallel, will the fork listener be called?