2.1/dev/core/test/com/google/gwt/dev/cfg/testdata/merging/Three.gwt.xml

<module>
  <!-- note that it is deliberate including Toxic.java here is overridden by
       the exclusion in module One -->
  <source path="client" includes="Shared.java,Toxic.java"/>
  <inherits name="com.google.gwt.dev.cfg.testdata.merging.One"/>
</module>