title: How to share String among multiple modules?
body: <p>I have 3 modules: <code>mod1</code>, <code>mod2</code> and <code>mod3</code>. Module <code>mod1</code> has dependencies <code>mod2</code> and <code>mod3</code>.</p>
  
  <p>I want to have one String (in particular it will be UserAgent because all 3 modules HTTP-talk to some server and all 3 should have the same user agent set) to be shared among those 3 modules.</p>