/usr/share/doc/libjets3t-java/api/org/jets3t/servlets/gatekeeper/impl/ is in libjets3t-java-doc 0.8.1+dfsg-1.
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/usr/share/doc/libjets3t-java/api/org/jets3t/servlets/gatekeeper/impl/DefaultAuthorizer.html
/usr/share/doc/libjets3t-java/api/org/jets3t/servlets/gatekeeper/impl/DefaultBucketLister.html
/usr/share/doc/libjets3t-java/api/org/jets3t/servlets/gatekeeper/impl/DefaultTransactionIdProvider.html
/usr/share/doc/libjets3t-java/api/org/jets3t/servlets/gatekeeper/impl/DefaultUrlSigner.html
/usr/share/doc/libjets3t-java/api/org/jets3t/servlets/gatekeeper/impl/ExternalUuidProvider.html
/usr/share/doc/libjets3t-java/api/org/jets3t/servlets/gatekeeper/impl/RenameToUuidUrlSigner.html
/usr/share/doc/libjets3t-java/api/org/jets3t/servlets/gatekeeper/impl/package-frame.html
/usr/share/doc/libjets3t-java/api/org/jets3t/servlets/gatekeeper/impl/package-summary.html
/usr/share/doc/libjets3t-java/api/org/jets3t/servlets/gatekeeper/impl/package-tree.html