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diff --git a/ACE/examples/Smart_Pointers/Gadget_Impl.h b/ACE/examples/Smart_Pointers/Gadget_Impl.h
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+++ b/ACE/examples/Smart_Pointers/Gadget_Impl.h
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+/* -*- C++ -*- */
+//=============================================================================
+/**
+ *  @file    Gadget_Impl.h
+ *
+ *  $Id$
+ *
+ *  @author Christopher Kohlhoff <chris@kohlhoff.com>
+ */
+//=============================================================================
+
+#ifndef GADGET_IMPL_H
+#define GADGET_IMPL_H
+
+#include "ace/Unbounded_Queue.h"
+#include "Gadget.h"
+#include "Gadget_Part.h"
+
+/**
+ * @class Gadget_Impl
+ *
+ * @brief An implementation of the Gadget interface.
+ */
+class Gadget_Impl : public Gadget
+{
+public:
+  /// Constructor.
+  Gadget_Impl (void);
+
+  /// Destructor.
+  virtual ~Gadget_Impl (void);
+
+  /// Add a new part to the gadget. The gadget takes ownership of the part
+  /// object.
+  virtual void add_part (Gadget_Part_var part);
+
+  /// Remove a random part from the gadget. Ownership of the part is returned
+  /// to the caller.
+  virtual Gadget_Part_var remove_part (void);
+
+  /// Ask the gadget to print information about the parts that it contains.
+  virtual void list_parts (void);
+
+private:
+  /// The parts which make up this gadget. The set actually contains instances
+  /// of Gadget_Part_var to automatically manage the lifetimes of the
+  /// constituent parts.
+  ACE_Unbounded_Queue<Gadget_Part_var> parts_;
+};
+
+#endif /* GADGET_IMPL_H */