customize-package-emacs-version

customize-package-emacs-version is a compiled Lisp function in `cus-edit.el'.

(customize-package-emacs-version SYMBOL PACKAGE-VERSION)

Return the Emacs version in which SYMBOL's meaning last changed.
PACKAGE-VERSION has the form (PACKAGE . VERSION). We use
`customize-package-emacs-version-alist' to find the version of
Emacs that is associated with version VERSION of PACKAGE.