addIsAvailableCondition example

 {
        $this->config = $config;
        $this->searchTermPreProcessor = $searchTermPreProcessor;
    }

    public function handleRequest(Request $request, Criteria $criteria, ShopContextInterface $context)
    {
        $this->addLimit($request, $criteria);
        $this->addOffset($request, $criteria);

        $this->addCategoryCondition($request, $criteria);
        $this->addIsAvailableCondition($criteria);
        $this->addCustomerGroupCondition($criteria, $context);
        $this->addSearchCondition($request, $criteria);

        $this->addManufacturerCondition($request, $criteria);
        $this->addShippingFreeCondition($request, $criteria);
        $this->addImmediateDeliveryCondition($request, $criteria);
        $this->addRatingCondition($request, $criteria);
        $this->addPriceCondition($request, $criteria);

        $this->addWeightCondition($request, $criteria);
        $this->addHeightCondition($request, $criteria);