+ extract_grob_set (b, "note-heads", heads);
+ common = common_refpoint_of_array (heads, common, X_AXIS);
+ for (vsize i = 0; i < heads.size (); i++)
+ {
+ Grob *h = heads[i];
+ Grob *dots = Rhythmic_head::get_dots (h);
+ if (dots)
+ common = dots->common_refpoint (common, X_AXIS);
+ }