title: Capture full webpage screenshot in selenium that has sticky header
body: <p>I want to capture a full page screenshot of a webpage that has a sticky header.
  Say for example <a href="https://www.flipkart.com/" rel="nofollow noreferrer">https://www.flipkart.com/</a> site has the sticky header. I am using Ashot and it took the screenshot like the one below. <a href="https://www.flipkart.com/" rel="nofollow noreferrer">https://www.flipkart.com/</a></p>
  
  <p>You can see the header is appearing between the image</p>
  
  <p>It would be really helpful if I could find any ideas on how to achieve </p>
  
  <p><a href="https://i.stack.imgur.com/DHS8Q.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DHS8Q.jpg" alt="enter image description here"></a></p>