Grob *head = acc->get_parent (Y_AXIS);
Grob *col = head->get_parent (X_AXIS);
- if (Note_column::has_interface (col))
+ if (has_interface<Note_column> (col))
note_cols.push_back (col);
else
ret.push_back (head);
for (vsize i = note_cols.size (); i--;)
{
Grob *c = note_cols[i]->get_parent (X_AXIS);
- if (Note_collision_interface::has_interface (c))
+ if (has_interface<Note_collision_interface> (c))
{
extract_grob_set (c, "elements", columns);
concat (note_cols, columns);