The problem is that GWT responds poorly to two .gwt.xml files in the same
    Java package; see
    https://groups.google.com/g/google-web-toolkit-contributors/c/CqYH59Dt_rQ/m/uVGW1QdUsXUJ
    for details.

    The summary is that it ignores one file in favor of the other.
    util.concurrent, like nearly all our packages, has two .gwt.xml files: one

		</postConstruct>
		<postConstruct name="addRule">
			<arg>"mimeType"</arg>
			<!-- Supported MIME type -->
			<arg>
  "(application/xml"
+ "|application/xhtml+xml"
+ "|application/rdf+xml"
+ "|application/pdf"
+ "|application/x-freemind"
+ "|text/xml"
+ "|text/xml-external-parsed-entity)"
			</arg>
		</postConstruct>
	</component>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components>
	<include path="convention.xml" />
	<include path="lastaflute_core.xml"/>
	<include path="fess.xml" />

	<component name="fessSuggest" class="org.codelibs.fess.exec.SuggestCreator"
			   instance="prototype">
	</component>
	<component name="suggestHelper" class="org.codelibs.fess.helper.SuggestHelper">

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components>
	<include path="convention.xml" />
	<include path="lastaflute_core.xml"/>
	<include path="fess.xml" />

	<include path="crawler_opensearch.xml" />
	<include path="fess_thumbnail.xml"/>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components>
	<include path="convention.xml" />
	<include path="lastaflute_core.xml"/>
	<include path="fess.xml" />

	<include path="crawler_opensearch.xml" />
	<include path="fess_thumbnail.xml" />
	<include path="fess_ingest.xml" />

<?xml version="1.0" encoding="UTF-8" ?>
<eef>
	<config Schema="2.0" EnterpriseVersion="'7.6.50'">
		<collections Count="3">
			<collection Name="fess">
				<bad_urls><![CDATA[
https://fess.codelibs.org/images/
              ]]></bad_urls>
				<good_urls><![CDATA[
https://fess.codelibs.org/
https://www.codelibs.org/
              ]]></good_urls>
				<prerequisite_results><![CDATA[
20
              ]]></prerequisite_results>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components namespace="fessCrawler">
	<include path="crawler/container.xml" />
	<include path="crawler/robotstxt.xml" />
	<include path="crawler/contentlength.xml" />
	<include path="crawler/mimetype.xml" />

	<component name="internalHttpClient" class="org.codelibs.fess.crawler.client.http.HcHttpClient"

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components namespace="fessCrawler">
	<include path="crawler/container.xml" />

	<component name="intervalController"
		class="org.codelibs.fess.crawler.interval.FessIntervalController"
		instance="prototype">
	</component>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components namespace="fessCrawler">
	<include path="crawler/container.xml" />

	<component name="urlFilter"
		class="org.codelibs.fess.crawler.filter.impl.UrlFilterImpl" instance="prototype">
	</component>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components>
	<include path="esclient.xml"/>

	<!-- The components of DBFlute Runtime. -->
	<component name="invokerAssistant" class="org.codelibs.fess.opensearch.common.ImplementedInvokerAssistant"/>
	<component name="behaviorCommandInvoker" class="org.dbflute.bhv.core.BehaviorCommandInvoker"/>