/usr/share/doc/libnb-svnclientadapter-java-doc/api/package-list is in libnb-svnclientadapter-java-doc 6.7-0ubuntu2.
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The actual contents of the file can be viewed below.
1 2 | org.tigris.subversion.svnclientadapter
org.tigris.subversion.svnclientadapter.utils
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