/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/ is in libplexus-container-default-java-doc 1.0-alpha-9-stable-1-6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/AbstractComponentComposer.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/ComponentComposer.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/ComponentComposerManager.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/CompositionException.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/CompositionResolver.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/DefaultComponentComposerManager.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/DefaultCompositionResolver.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/FieldComponentComposer.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/MapOrientedComponentComposer.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/NoOpComponentComposer.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/SetterComponentComposer.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/UndefinedComponentComposerException.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/package-frame.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/package-summary.html
/usr/share/doc/libplexus-container-default-java/api/org/codehaus/plexus/component/composition/package-tree.html