I am having the controller which is responding with resultJson(\Magento\Framework\Controller\Result\JsonFactory), I have given setData. And I need to set header as JSON. I want the JSON result in the tree(PRETTY) format. Kindly help me.

This is my code: 

    \Magento\Framework\Controller\Result\JsonFactory $resultJsonFactory,
    .
    .
    $resultJson = $this->_resultJsonFactory->create();
    .
    .
    $resultJson->setHeader('Content-type', 'application/json',true);
    $resultJson->setData(["view_url"=> "/","results"=>$results]);
           
    return $resultJson;


which is resulting with:

    {"view_url":"\/","results":[{"product_image":"\/p11.jpg","product_name":"name1","product_desc":"protection.","absorbency":"hik","special_size":"Yes","product_url":"\/"},{"product_image":"\/p1.jpg","product_name":"name2","product_desc":" protection.","absorbency":"high","special_size":"No","product_url":"\/"}]}

But i need like this: (with response header as JSON)

    {
      "view_url": "/",
      "results": [
        {
          "product_image": "/p11.jpg",
          "product_name": "name1",
          "product_desc": "protection.",
          "absorbency": "hik",
          "special_size": "Yes",
          "product_url": "/"
        },
        {
          "product_image": "/p1.jpg",
          "product_name": "name2",
          "product_desc": " protection.",
          "absorbency": "high",
          "special_size": "No",
          "product_url": "/"
        }
      ]
    }