Method ToString

tensorflow/compiler/xla/tests/reduce_hlo_test.cc:35–38

  std::array<int64, 3> output_minor_to_major;

  string ToString() const {
    return absl::StrCat(absl::StrJoin(input_minor_to_major, "x"), "_",
                        absl::StrJoin(output_minor_to_major, "x"));
  }
};

string PrintReduceLayout(