ff-get-file

ff-get-file is a compiled Lisp function in `find-file.el'.

(ff-get-file SEARCH-DIRS FILENAME &optional SUFFIX-LIST OTHER-WINDOW)

Find a file in the SEARCH-DIRS with the given FILENAME (or filename stub).
If (optional) SUFFIX-LIST is nil, search for FILENAME, otherwise search
for FILENAME with each of the given suffixes. Get the file or the buffer
corresponding to the name of the first file found, or nil.