title: For Google Guava ImmutableLists is creating a copy of Collections.EMPTY_LIST equivalent to ImmutableList.of()?
body: <p>Of these which one is preferred?</p>
  
  <pre><code>private static ImmutableList&lt;Airline&gt; sAirlines = 
                            ImmutableList.copyOf(Collections.EMPTY_LIST);
  
  private static ImmutableList&lt;Airline&gt; sAirlines = ImmutableList.of();
  </code></pre>