Merge branch 'master' of git://git.sv.gnu.org/lilypond

[lilypond.git] / lily / include / volta-bracket.hh

diff --git a/lily/include/volta-bracket.hh b/lily/include/volta-bracket.hh
index f9999b92f61234abab64aecb1e9f8e6caadef748..687439cc7f8078e8bf7aa0a6e8cdb7a5f7b7741b 100644 (file)
--- a/lily/include/volta-bracket.hh
+++ b/lily/include/volta-bracket.hh
@@ -8,11 +8,12 @@
 #define VOLTA_SPANNER_HH
 
 #include "spanner.hh"
+#include "lily-proto.hh"
 
 class Volta_bracket_interface
 {
 public:
-  static bool has_interface (Grob *);
+  DECLARE_GROB_INTERFACE();
   DECLARE_SCHEME_CALLBACK (print, (SCM));
   static void modify_edge_height (Spanner *);
   static void add_column (Grob *, Grob *col);