title: NoSuchMethodError: com.google.common.base.Stopwatch.createStarted()Lcom/google/common/base/Stopwatch
body: <p>My app is throwing <code>NoSuchMethodError: com.google.common.base.Stopwatch.createStarted()Lcom/google/common/base/Stopwatch</code> error. Not sure why, because 16.0.1 do contain that class, I've checked. From what I have researched, it looks like this is a bug?</p>
  
  <p>I also have this code for refernence, though I think this is not the issue:</p>
  
  <pre><code>    FirewallRule rule = new PeriodicFirewallCounterRule(60, TimeUnit.SECONDS, new IpAddressCountingPolicy());
      ((PeriodicFirewallCounterRule)rule).addHandler(new RateLimitationHandler(new UniqueLimitPolicy(10)));
      FirewallFilter firewallFiler = new FirewallFilter(getContext(), list(rule));
      firewallFiler.setNext(ma);
  </code></pre>
  
  <p>My app is using Restlet APISpark:</p>
  
  <pre><code>  &lt;dependency&gt;
        &lt;groupId&gt;org.restlet.gae&lt;/groupId&gt;
        &lt;artifactId&gt;org.restlet.ext.apispark&lt;/artifactId&gt;
        &lt;version&gt;${version.restlet}&lt;/version&gt;
    &lt;/dependency&gt;
  </code></pre>
  
  <p>When running and accessing the REST api of the app, it throws this
  error:</p>
  
  <pre><code>[INFO] Caused by: java.lang.NoSuchMethodError: com.google.common.base.Stopwatch.createStarted()Lcom/google/common/base/Stopwatch;
  [INFO]  at org.restlet.ext.apispark.internal.firewall.rule.counter.PeriodicCounter.&lt;init&gt;(PeriodicCounter.java:65)
  [INFO]  at org.restlet.ext.apispark.internal.firewall.rule.PeriodicFirewallCounterRule$1.load(PeriodicFirewallCounterRule.java:86)
  [INFO]  at org.restlet.ext.apispark.internal.firewall.rule.PeriodicFirewallCounterRule$1.load(PeriodicFirewallCounterRule.java:84)
  [INFO]  at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3599)
  [INFO]  at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2379)
  [INFO]  at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2342)
  [INFO]  at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2257)
  [INFO]  ... 74 more
  </code></pre>