public function loadChildren()
    {
        $loader = new CollectionLoader([
            'logger'  => $this->logger,
            'factory' => $this->modelFactory()
        ]);
        $loader->setModel($this);

        $loader->addFilter([
            'property' => 'master',
            'value'      => $this->id()
        ]);
        $loader->addFilter([
            'property' => 'active',
            'value'      => true
        ]);

        $loader->addOrder([
            'property' => 'position',
            'mode'     => 'asc'
        ]);

        return $loader->load();
    }