Method value_data_length

cpp/src/arrow/array/builder_binary.h:355–355

\return size of values buffer so far

  const uint8_t* value_data() const { return value_data_builder_.data(); }
  /// \return size of values buffer so far
  int64_t value_data_length() const { return value_data_builder_.length(); }
  /// \return capacity of values buffer
  int64_t value_data_capacity() const { return value_data_builder_.capacity(); }