Function AppendNulls

cpp/src/arrow/builder.cc:113–113

  }
  Status AppendNull() override { return builder_->AppendNull(); }
  Status AppendNulls(int64_t length) override { return builder_->AppendNulls(length); }
  Status AppendEmptyValue() override { return builder_->AppendEmptyValue(); }
  Status AppendEmptyValues(int64_t length) override {
    return builder_->AppendEmptyValues(length);