title: @Transactional method calling another method without @Transactional anotation?
body: <p>I've seen a method in a Service class that was marked as <code>@Transactional</code>, but it was also calling some other methods in that same class which were not marked as <code>@Transactional</code>.</p>
  
  <p>Does it mean that the call to separate methods are causing the application to open separate connections to DB or suspend the parent transaction, etc?</p>
  
  <p>What's the default behavior for a method without any annotations which is called by another method with <code>@Transactional</code> annotation?</p>