Variable: tab-line-cache-key-function
tab-line-cache-key-function is a variable defined in tab-line.el.gz.
Value
tab-line-cache-key-default
Documentation
Function that adds more cache keys.
It is called with one argument, a list of tabs, and should return a list
of cache keys. You can use add-function to add more cache keys.
Also there is the function tab-line-force-update that clears the cache.
Source Code
;; Defined in /usr/src/emacs/lisp/tab-line.el.gz
(defvar tab-line-cache-key-function #'tab-line-cache-key-default
"Function that adds more cache keys.
It is called with one argument, a list of tabs, and should return a list
of cache keys. You can use `add-function' to add more cache keys.
Also there is the function `tab-line-force-update' that clears the cache.")