org-list-get-item-number
org-list-get-item-number is a compiled Lisp function in `org-list.el
'.
(org-list-get-item-number ITEM STRUCT PREVS PARENTS)
Return ITEM's sequence number.
STRUCT is the list structure. PREVS is the alist of previous
items, as returned by `org-list-prevs-alist'. PARENTS is the
alist of ancestors, as returned by `org-list-parents-alist'.
Return value is a list of integers. Counters have an impact on
that value.