Function GeneratorField

cpp/src/arrow/testing/generator.h:302–303

  GeneratorField(std::shared_ptr<ArrayGenerator> gen)  // NOLINT implicit conversion
      : name(), gen(std::move(gen)) {}
  GeneratorField(std::string name, std::shared_ptr<ArrayGenerator> gen)
      : name(std::move(name)), gen(std::move(gen)) {}

  std::optional<std::string> name;
  std::shared_ptr<ArrayGenerator> gen;