title: Search After (pagination) in Elasticsearch when sorting by score
body: <p>Search after in elasticsearch must match its sorting parameters in count and order. So I was wondering how to get the score from previous result (example page 1) to use it as a search after for next page.
  I faced an issue when using the score of the last document in previous search. The score was 1.0, and since all documents has 1.0 score, the result for next page turned out to be null (empty).</p>
  
  <p>That's actually make sense, since I am asking elasticsearch for results that has lower rank (score) than 1.0 which are zero, so which score do I use to get  the next page.</p>
  
  <p>Note:
  I am sorting by score then by TieBreakerID, so one possible solution is using high value (say 1000) for score. </p>