title: How to get the head of a linkedlist?
body: <p>Say we have a linkedList</p>
  
  <pre><code>LinkedList&lt;Integer&gt; list = new LinkedList&lt;Integer&gt;();
  list.add(3);
  list.add(5);
  list.add(6);
  </code></pre>
  
  <p>How can we access the head of the linkedlist?
  The function getFirst() is not what I need here, since it only returns the first element 3 rather than the first node. How can I get the first node of the list?
  The first node in my example is a node with value 3, pointing to 5.</p>