title: Where is the apply method in the docs, for Scala collection factory objects?
body: <p>Because I can write:</p>
  
  <pre><code>DoubleLinkedList(1,2,3,4)
  </code></pre>
  
  <p>I expected to find an <code>apply</code> method in the <code>DoubleLinkedList</code> companion object, but I see nothing in the <a href="http://www.scala-lang.org/api/current/index.html#scala.collection.mutable.DoubleLinkedList%24" rel="nofollow">docs linked here</a>.  Where is it?  Or, why is it not there?</p>