</excludePackageNames>
          <!-- Ignore some tags that are found in Java 11 sources but not recognized... under -source 8, I think it was? I can no longer reproduce the failure. -->
          <tags>
            <tag>

            the add-opens. Right now that doesn't seem worth the effort, though.
        -->
        <test.add.opens>
          --add-opens java.base/java.lang=ALL-UNNAMED
          --add-opens java.base/java.util=ALL-UNNAMED
          --add-opens java.base/sun.security.jca=ALL-UNNAMED
        </test.add.opens>
      </properties>
    </profile>
    <profile>
      <id>javac9-for-jdk8</id>

          </excludePackageNames>
          <!-- Ignore some tags that are found in Java 11 sources but not recognized... under -source 8, I think it was? I can no longer reproduce the failure. -->
          <tags>
            <tag>

                    <include name="guava-gwt-sources/**/*.java"/>
                    <include name="guava-test-gwt-sources/**/*.java"/>
                  </fileset>
                </replace>
                <replace token="@NonNull" value="">
                  <fileset dir="${project.build.directory}">
                    <include name="guava-gwt-sources/**/*.java"/>
                    <include name="guava-test-gwt-sources/**/*.java"/>