title: How to debug Dependency Injection Bugs in Extbase?
body: <p>I'm building an extension in Extbase (latest version, latest typo3) and am having repositories injected into my models.</p>
  
  <p>This simply does not work. No errors, no clues, nothing. The inject* Method simply does not get called. The exact same Injection works in the controller.</p>
  
  <p>Is it possible to inject Repositories into models in Extbase? In general, injection to models is possible since 1.4.</p>
  
  <p>How can I debug this? Where do I have to look?</p>