isearch-resume
isearch-resume is a compiled Lisp function in `isearch.el
'.
(isearch-resume STRING REGEXP WORD FORWARD MESSAGE CASE-FOLD)
Resume an incremental search.
STRING is the string or regexp searched for.
REGEXP non-nil means the resumed search was a regexp search.
WORD non-nil means resume a word search.
FORWARD non-nil means resume a forward search.
MESSAGE is the echo-area message recorded for the search resumed.
CASE-FOLD non-nil means the search was case-insensitive.