title: Accessing variables in transformer
body: <p>I'm running Mule CE and in one of my flows I'm accessing a static XML fil containging complex objects.
  I read this one using a bean and save it in a variable.</p>
  
  <pre><code>&lt;set-variable variableName="Settings" value="#[app.registry['LoadSetting']]" doc:name="Variable"/&gt;
  </code></pre>
  
  <p>So far so good.
  In my Transformer I then need to read these values, find the object with the right key and fill in some values in my payload. 
  So, how can i access this variable in my Transformer class, like</p>
  
  <pre><code>message.getInvocationProperty("test");
  </code></pre>
  
  <p>As far as I understand, the "message" itself isn't avilable.. or is it?</p>
  
  <p>I did find the advicein the question <a href="https://stackoverflow.com/questions/16457176/mule-studio-pass-set-variable-to-java-transformer">here</a> but I didn't really understand that answer (it's Friday after all..)</p>
  
  <p>Regards</p>