title: Guava r07, GWT and javax.annotation.Nullable
body: <p>I'm trying to use Guava in a GWT project without success (a HashMultimap, to be precise).  I get a never-ending list of stacktraces for classes:</p>
  
  <ul>
  <li>com.google.common.collect.ComparisonChain</li>
  <li>com.google.common.collect.ForwardingSortedSetMultimap</li>
  <li>com.google.common.collect.Ordering</li>
  <li>...</li>
  </ul>
  
  <p>Each stack trace is along the lines of:</p>
  
  <ul>
  <li>line xx: the import javax.annotation cannot be resolved</li>
  <li>line xx: Nullable cannot be resolved to a type</li>
  <li>line xx: Nullable cannot be resolved to a type</li>
  <li>line xx: Nullable cannot be resolved to a type</li>
  <li>...</li>
  </ul>
  
  <p>Looking at the code, each file that throws an error includes:</p>
  
  <blockquote>
    <p>import javax.annotation.Nullable;</p>
  </blockquote>
  
  <p>and, looking at the guava-src-r07.jar, each mentioned classes uses a @Nullable annotation.</p>
  
  <p>I'm using JDK6 and looking at the JDK6 javadoc and...well, I can't find any such annotation.  Can I get these libraries to work with a GWT project and JDK6?</p>
  
  <p>P.S. - What version of Java are you using over there?</p>