/usr/share/doc/libjgoodies-forms-java/api/com/jgoodies/forms/debug/ is in libjgoodies-forms-java-doc 1.6.0-4.
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/usr/share/doc/libjgoodies-forms-java/api/com/jgoodies/forms/debug/FormDebugPanel.html
/usr/share/doc/libjgoodies-forms-java/api/com/jgoodies/forms/debug/FormDebugUtils.html
/usr/share/doc/libjgoodies-forms-java/api/com/jgoodies/forms/debug/class-use/
/usr/share/doc/libjgoodies-forms-java/api/com/jgoodies/forms/debug/class-use/FormDebugPanel.html
/usr/share/doc/libjgoodies-forms-java/api/com/jgoodies/forms/debug/class-use/FormDebugUtils.html
/usr/share/doc/libjgoodies-forms-java/api/com/jgoodies/forms/debug/package-frame.html
/usr/share/doc/libjgoodies-forms-java/api/com/jgoodies/forms/debug/package-summary.html
/usr/share/doc/libjgoodies-forms-java/api/com/jgoodies/forms/debug/package-tree.html
/usr/share/doc/libjgoodies-forms-java/api/com/jgoodies/forms/debug/package-use.html