private function isIncluded($slotName)
    {
        if ( ! preg_match('/^([0-9]+)\-/', $slotName, $matches)) {
            return false;
        }

        // @codeCoverageIgnoreStart
        $blockId = $matches[1];
        $slotBlocks = $this->pageBlocks->getBlocks();
        foreach ($slotBlocks as $blocks) {
            foreach ($blocks as $block) {
                if ($block->getId() == $blockId) {
                    return true;
                }
            }
        }

        return false;
        // @codeCoverageIgnoreEnd
    }