Method Append

cpp/src/arrow/array/builder_nested.h:282–286

\brief Start a new variable-length list slot This function should be called before beginning to append elements to the value builder

  /// This function should be called before beginning to append elements to the
  /// value builder
  Status Append(bool is_valid = true) {
    // The value_length parameter to BASE::Append(bool, int64_t) is ignored when
    // building a list array, so we can pass 0 here.
    return BASE::Append(is_valid, 0);
  }

  /// \brief Vector append
  ///