code: def next(self):
          
          if self.count == 0:
              raise StopIteration
          elif self.count > 1:
              print_rehearsal_header()
          else:
              if self.rehearse:
                  gc.collect()
                  print("-" * 59)
                  print()
              print_header()
  
          self.count -= 1
          return self
docs: Runs the next iteration of the benchmark.