Method Begin

tests/gtest/gtest.h:10606–10608

  ~RangeGenerator() override {}

  ParamIteratorInterface<T>* Begin() const override {
    return new Iterator(this, begin_, 0, step_);
  }
  ParamIteratorInterface<T>* End() const override {
    return new Iterator(this, end_, end_index_, step_);
  }