Cakephp3- unable to fetch all acos for an aros

I’m trying to fetch all acos for a given aros.

Cakephp version I’m using is 3.4

As ACL is not built-in I use this plugin.

I’m able to fetch all acos available by using this code:

   $acos = $this->Acl->Aco->find('all', array('order' => 'Acos.lft ASC', 'recursive' => -1))
           ->contain(['Aros' ]) 
           ->toArray();

And, following is the code I wrote to fetch all acos for a given aros

 $acos = $this->Acl->Aco->find('all', array('order' => 'Acos.lft ASC', 'recursive' => -1))
       ->contain(['Aros'  => function ($q) {
                    return $q->where(['id' => 1]);
                } ]) 
       ->toArray();

But it does not return the correct result. Instead, it returns all the acos (the same result the above code returns)

Can anyone help me identify the issue? Thanks!

Is there a way to do this?

Look into the matching method in the QueryBuilder