Have anybody met with need to add your own "Show in" action in the
list? I have successfully implemented "Show in" between my own views
with "IShowInTargetList", "IShowInSource" interfaces, but how can I
extend "Package Explorer" or "Navigator" "show in" list with some
additional MY menus? I noticed that somehow jdt plugins extends
"Navigator" view with "Show In package explorer", but how it could be done?