Mage2\Catalog\Models\Product::getProductImages PHP Method

    public function getProductImages($first = false)
    {
        //$cacheKey = get_class($this) . "_" . __METHOD__;
        //if (Cache::has($cacheKey)) {
        //    $attributeValue = Cache::get($cacheKey);
        //} else {
        $productAttribute = ProductAttribute::where('identifier', '=', 'image')->get()->first();
        $attributeValue = $productAttribute->productVarcharValues()->where('product_id', '=', $this->attributes['id'])->where('website_id', '=', $this->websiteId)->get();
        //}
        if (true == $first) {
            return $attributeValue->first();
        }
        //Cache::put($cacheKey, $attributeValue, $minute = 100);
        return $attributeValue;
    }