Find the visible minor mode bindings of KEY.
Return an alist of pairs (MODENAME . BINDING), where MODENAME is
the symbol which names the minor mode binding KEY, and BINDING is
KEY's definition in that mode. In particular, if KEY has no
minor-mode bindings, return nil. If the first binding is a
non-prefix, all subsequent bindings will be omitted, since they would
be ignored. Similarly, the list doesn't include non-prefix bindings
that come after prefix bindings.
If optional argument ACCEPT-DEFAULT is non-nil, recognize default
bindings; see the description of `lookup-key' for more details about this. (fn KEY &optional ACCEPT-DEFAULT)