message: COMP: Fixed unused variable 'caller'
  From rtkIterationCommands.h
diff: @@ -100,7 +100,7 @@ public:
  protected:
  void
  - Run(const TCaller * caller) override
  + Run(const TCaller * itkNotUsed(caller)) override
  {
  std::cout << "Iteration " << this->m_IterationCount << " completed."
  << std::endl; // TODO allow string personnalization
  