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@@ -154,10 +154,11 @@
   // Space inquiries (results in bytes)
   size_t initial_size();
   virtual size_t capacity() const = 0;  // The maximum number of object bytes the
                                         // generation can currently hold.
   virtual size_t used() const = 0;      // The number of used bytes in the gen.
+  virtual size_t used_stable() const;   // The number of used bytes for memory monitoring tools.
   virtual size_t free() const = 0;      // The number of free bytes in the gen.
   // Support for java.lang.Runtime.maxMemory(); see CollectedHeap.
   // Returns the total number of bytes  available in a generation
   // for the allocation of objects.