Variable: doc-view--outline
doc-view--outline is a buffer-local variable defined in
doc-view.el.gz.
Documentation
Cached document outline, so that it is only computed once per document.
It can be the symbol unavailable to indicate that outline is
unavailable for the document.
Source Code
;; Defined in /usr/src/emacs/lisp/doc-view.el.gz
;;;; Imenu support
(defvar-local doc-view--outline nil
"Cached document outline, so that it is only computed once per document.
It can be the symbol `unavailable' to indicate that outline is
unavailable for the document.")