custom--sort-varscustom--sort-vars is a compiled Lisp function in `
custom.el'. (custom--sort-vars VARS) Sort VARS based on custom dependencies. VARS is a list whose elements have the same form as the ARGS arguments to `custom-theme-set-variables'. Return the sorted list, in which A occurs before B if B was defined with a `:set-after' keyword specifying A (see `defcustom').