Discern single note-event from one in a chord

[Urs Liska]

Hi,

is there a way to discern whether the ly:music? passed into a music function is a single note-event or a note within a chord?

\version "2.19.80"

testType =
#(define-music-function (music)(ly:music?)
   (ly:message "Music type(s): ~a" (ly:music-property music 'types))
   music)

{
  \clef bass
  \testType c
  <c \testType e g>
}

prints `Music type(s): (event note-event rhythmic-event melodic-event)` in both cases.

Is there anything else besides the 'types music-property I can check for in this context? I hope there is because there are many respects in which the two would have to be treated differently. Is there maybe a way to get to a music's "parent" in order to check what type that is?

Thanks
Urs