Cakephp3 - Retrieve entity based on related entity conditions

cake3ORMMatching.php

<?php
        ...
        
        $this->loadModel('Posts');
        $posts = $this->Posts
            ->find('all')
            ->limit(6)
            ->contain([
                'Filed.Files',
                'Filed.Thumbs',
                'Filed.Filedtypes'
            ])
        ;

        if ($center_id) {
            $posts->matching('Centers', function ($q) use ($center_id) {
                return $q->where(['Centers.id' => $center_id]);
            });
        }
        
        ...