X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flibr2c2%2Ftrackchain.h;h=e2d6176f2c1733ff093975d39ef5afe132bbebc4;hb=df99c7e41d87084fe7f71729f3df33d7effc59cc;hp=729a89cd9c6910882fe641721f86751e93df21e0;hpb=72cc2ffc70f78d255297c3b8aa19618806f62a94;p=r2c2.git

diff --git a/source/libr2c2/trackchain.h b/source/libr2c2/trackchain.h
index 729a89c..e2d6176 100644
--- a/source/libr2c2/trackchain.h
+++ b/source/libr2c2/trackchain.h
@@ -4,6 +4,7 @@
 #include <set>
 #include <stdexcept>
 #include <sigc++/trackable.h>
+#include <msp/datafile/statement.h>
 #include "trackiter.h"
 
 namespace R2C2 {
@@ -65,6 +66,9 @@ public:
 
 private:
 	void object_removed(Object &);
+
+public:
+	virtual Msp::DataFile::Statement save_reference() const = 0;
 };
 
 } // namespace R2C2