title: Write a Unit Test to check the variable which is not getting returned by the method
body: <p>Below is the codeSnippet of what i have to test:
  the builder value is getting set but it is not being returned.
  Please suggest me a way to test the below method.</p>
  <pre><code> public String convertMarkup(request)
   {
       Builder builder = new Response.builder(); 
       String markUpData;
       Map&lt;String,List&lt;String&gt;&gt;collectUrls= collectUrlMethod(request);
       
       if(MapUtils.isNotEmpty(collectUrls)){
           builder.setTrackerValue(collectUrls.get(Final_value).get(0));
           builder.build(); 
       }else{
           markUpData=&quot;abc&quot;; 
           // rest of the code  
       }
       
       return markUpData; 
   }
  </code></pre>