title: Arrays.getOnlyElement()?
body: <p>Is there any equivalent to <a href="http://google-collections.googlecode.com/svn/trunk/javadoc/com/google/common/collect/Iterables.html#getOnlyElement%28java.lang.Iterable%29" rel="noreferrer">Collections.getOnlyElement()</a> that works with arrays?</p>
  
  <p>I'm aware it's a trivial function to implement, but Collections.getOnlyElement() is as well, and it's in guava.</p>