code: public function addSlot($slotName, $blocks = array(), $username = null)
      {
          $slotsDir = $this->siteDir . '/slots/' . $slotName;
          foreach ($this->siteInfo["languages"] as $languageName) {
              $languageDir = $slotsDir . '/' . $languageName;
              $this->generateSlot($languageDir, $blocks, $username);
          }
      }
docs: {@inheritdoc}