1 files changed, 6 insertions, 6 deletions
diff --git a/src/outputgen.h b/src/outputgen.h
index 8d9db65..e302f42 100644
--- a/src/outputgen.h
+++ b/src/outputgen.h
@@ -428,16 +428,16 @@ class OutputGenerator : public BaseOutputDocInterface
     virtual void startClassDiagram() = 0;
     virtual void endClassDiagram(const ClassDiagram &,const char *,const char *) = 0;
     virtual void startDotGraph() = 0;
-    virtual void endDotGraph(const DotClassGraph &g) = 0;
+    virtual void endDotGraph(DotClassGraph &g) = 0;
     virtual void startInclDepGraph() = 0;
-    virtual void endInclDepGraph(const DotInclDepGraph &g) = 0;
+    virtual void endInclDepGraph(DotInclDepGraph &g) = 0;
     virtual void startGroupCollaboration() = 0;
-    virtual void endGroupCollaboration(const DotGroupCollaboration &g) = 0;
+    virtual void endGroupCollaboration(DotGroupCollaboration &g) = 0;
     virtual void startCallGraph() = 0;
-    virtual void endCallGraph(const DotCallGraph &g) = 0;
+    virtual void endCallGraph(DotCallGraph &g) = 0;
     virtual void startDirDepGraph() = 0;
-    virtual void endDirDepGraph(const DotDirDeps &g) = 0;
-    virtual void writeGraphicalHierarchy(const DotGfxHierarchyTable &g) = 0;
+    virtual void endDirDepGraph(DotDirDeps &g) = 0;
+    virtual void writeGraphicalHierarchy(DotGfxHierarchyTable &g) = 0;
     virtual void startQuickIndices() = 0;
     virtual void endQuickIndices() = 0;
     virtual void writeSplitBar(const char *) = 0;