title: How can i get design doc of spring framework opensource projects
body: <p>I would like to understand the spring-projects code base </p>
  
  <p><a href="https://github.com/spring-projects" rel="nofollow noreferrer">https://github.com/spring-projects</a>
  but i don't see any design doc for projects. 
  How can i get the design doc?</p>