title: How to join Kafka KStream to Kstream of 3 Topics
body: <p>I have 3 Topics : "BEGIN", "CONTINUE" and "END"
  These three topic needs to be joined in one Topic Message where i can get the Result Model that is a combination of the 3 Topic Messages.</p>
  
  <p>There are many example that shows how to join 2 topics.
  If anyone can give me an example or a hint of how can i make a Join or these 3 Topics.</p>