How to make extbase extension recognize storage page from plugin?

In an extbase extension built with extension builder on TYPO3 6.1.7, I haven't set any storagePid via Typoscript.

But I have set the "Record Storage Page" in the plugin:

I would expect that it would now only fetch records from this page. But it doesn't, it just returns all items from that table.

How do I make the extension recognize the setting from the plugin? Or (if it's supposed to do that out of the box) how do I find out why it doesn't?

Add the following code to your repository

namespace <Vendor>\<Extkey>\Domain\Repository;

class ExampleRepository extends \TYPO3\CMS\Extbase\Persistence\Repository {

    // Example for repository wide settings
    public function initializeObject() {
        /** @var $defaultQuerySettings \TYPO3\CMS\Extbase\Persistence\Generic\Typo3QuerySettings */
        $defaultQuerySettings = $this->objectManager->get('TYPO3\\CMS\\Extbase\\Persistence\\Generic\\Typo3QuerySettings');
        // add the pid constraint
        $defaultQuerySettings->setRespectStoragePage(TRUE);
}

    // Example for a function setup changing query settings
    public function findSomething() {
        $query = $this->createQuery();
        // add the pid constraint
        $query->getQuerySettings()->setRespectStoragePage(TRUE);
        // the same functions as shown in initializeObject can be applied.
        return $query->execute();
    }
}

You will find more informations at this page http://forge.typo3.org/projects/typo3v4-mvc/wiki/Default_Orderings_and_Query_Settings_in_Repository