inversion-find-version

inversion-find-version is a compiled Lisp function in `inversion.el'.

(inversion-find-version PACKAGE)

Search for the version and incompatible version of PACKAGE.
Does not load PACKAGE nor requires that it has been previously loaded.
Search in the directories in `load-path' for a PACKAGE.el library.
Visit the file found and search for the declarations of variables or
constants `PACKAGE-version' and `PACKAGE-incompatible-version'. The
value of these variables must be a version string.

Return a pair (VERSION-STRING . INCOMPATIBLE-VERSION-STRING) where
INCOMPATIBLE-VERSION-STRING can be nil.
Return nil when VERSION-STRING was not found.