diff -r caf16813b1e8 -r 1782aa72495a lemon/lp_skeleton.h
--- a/lemon/lp_skeleton.h	Sat Jul 21 10:18:57 2012 +0200
+++ b/lemon/lp_skeleton.h	Fri Jul 20 17:09:01 2012 +0200
@@ -144,6 +144,10 @@
 
     ///\e
     virtual void _messageLevel(MessageLevel);
+
+    ///\e
+    virtual void _write(std::string file, std::string format) const;
+
   };
 
   /// \brief Skeleton class for an LP solver interface
@@ -222,6 +226,7 @@
 
     ///\e
     virtual const char* _solverName() const;
+
   };
 
 } //namespace lemon