Method empty

src/common/param_array.h:46–46

  const_reference operator[](size_type i) const { return values_[i]; }
  reference operator[](size_type i) { return values_[i]; }
  [[nodiscard]] bool empty() const { return values_.empty(); }       // NOLINT
  [[nodiscard]] std::size_t size() const { return values_.size(); }  // NOLINT
  [[nodiscard]] auto data() const { return values_.data(); }         // NOLINT
  ParamArray& operator=(std::vector<T> const& that) {