Method CopyFrom

src/treelearner/split_info.hpp:212–217

  }

  void CopyFrom(const SplitInfo& other) {
    feature = other.feature;
    gain = other.gain;
    left_count = other.left_count;
    right_count = other.right_count;
  }

  void CopyFrom(const char* buffer) {
    std::memcpy(&feature, buffer, sizeof(feature));