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class TestEffect
{
 public:
  TestEffect(){}
  ~TestEffect(){ release(); }
  void release(){ clear(); }
  virtual void clear() = 0;
};
class SubTestEffect: public TestEffect
{
 public:
  SubTestEffect(){}
  ~SubTestEffect(){}
  virtual void clear(){ printf( "SubTestEffect::clear() called\n" }
};
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