title: Mule HTTP POST `form-data` conversion to Map
body: <p>My mule application is receiving a HTTP POST request with the <code>Content-Type</code> as <code>multipart/form-data</code>. I tried to use a custom transformer but do not know how to access the paramters as the object is of class <code>ContentLengthInputStream</code>.</p>
  
  <ol>
  <li>How do I access the form parameters?</li>
  <li>I want to convert the parameters into a map. How do I do this?</li>
  </ol>