Method iterations

extern/re2/util/benchmark.h:81–81

  void SetBytesProcessed(int64_t b) { SetBenchmarkBytesProcessed(b); }
  void SetItemsProcessed(int64_t i) { SetBenchmarkItemsProcessed(i); }
  int64_t iterations() const { return iters_; }
  // Pretend to support multiple arguments.
  int64_t range(int pos) const { CHECK(has_arg_); return arg_; }