title: Pass arguments in Slim DI service
body: <p>I have a service that I want to access from a route but pass arguments to.</p>
  
  <pre><code>$container = new \Slim\Container();    
  $container['myService'] = function($arg1, $arg2) {
          //my code here
  };
  $app = new \Slim\App($container);
  </code></pre>
  
  <p>and inside my route, I try to call the service like so:</p>
  
  <pre><code>$this-&gt;myService('my arg1', 'my arg2');
  </code></pre>
  
  <p>This is not working. When I try to call it without specifying the arguments, it works. </p>
  
  <p>How to call with arguments? Or is that an alternative way to specify a function or method to be called from inside a route?</p>