<plugin>
        <artifactId>maven-javadoc-plugin</artifactId>
        <configuration>
          <sourceFileExcludes>
            <!-- 4. Don't build Javadoc for it (since that, too, would require a *non-test* dep on gwt-user. -->
            <sourceFileExclude>**/ForceGuavaCompilation*</sourceFileExclude>
          </sourceFileExcludes>