/usr/share/doc/libasync-http-client-java/api/com/ning/http/client/listenable/ is in libasync-http-client-java-doc 1.6.5-1.
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/usr/share/doc/libasync-http-client-java/api/com/ning/http/client/listenable/AbstractListenableFuture.html
/usr/share/doc/libasync-http-client-java/api/com/ning/http/client/listenable/ExecutionList.html
/usr/share/doc/libasync-http-client-java/api/com/ning/http/client/listenable/class-use/
/usr/share/doc/libasync-http-client-java/api/com/ning/http/client/listenable/class-use/AbstractListenableFuture.html
/usr/share/doc/libasync-http-client-java/api/com/ning/http/client/listenable/class-use/ExecutionList.html
/usr/share/doc/libasync-http-client-java/api/com/ning/http/client/listenable/package-frame.html
/usr/share/doc/libasync-http-client-java/api/com/ning/http/client/listenable/package-summary.html
/usr/share/doc/libasync-http-client-java/api/com/ning/http/client/listenable/package-tree.html
/usr/share/doc/libasync-http-client-java/api/com/ning/http/client/listenable/package-use.html