title: Converting nested List of Lists into a Stream of Streams
body: <p>I've got the problem with nested Collection conversion to nested Stream.</p>
  
  <p>I was trying to convert each element of a list into a stream with forEach, but since I'm not that good with Java 8 Streams, I didn't managed to get it working.</p>
  
  <pre class="lang-java prettyprint-override"><code>List&lt;List&lt;String&gt;&gt; nestedLists = new ArrayList&lt;&gt;();
  
  [...] filling up List with data as List&lt;String&gt;
  
  Stream&lt;Stream&lt;String&gt;&gt; results = [???]
  
  </code></pre>
  
  <p>My goal is to return results var.</p>