Yes, the support is for imenu. I highlighted speedbar because it has been mentioned in this thread.

The vanilla M-x speedbar still opens an extra window ("frame" in Emacs lingo), but MELPA offers sr-speedbar which uses the same frame. I haven't tried it myself, though.

In reply to Re^4: IDE for Perl programming? by haj
in thread IDE for Perl programming? by rsFalse

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