156   // Called for each object.

   156   // Called for each object.

   157   virtual void do_object(oop obj) = 0;

   157   virtual void do_object(oop obj) = 0;

   158 };

   158 };

   159 

   159 

   160 

   160 

   162  public:

   162  public:

   163   virtual bool do_object_b(oop obj) = 0;

   163   virtual bool do_object_b(oop obj) = 0;

   164 };

   164 };

   165 

   165 

   166 // Applies an oop closure to all ref fields in objects iterated over in an

   166 // Applies an oop closure to all ref fields in objects iterated over in an