Method read_size

Libs/flatbuffers/flexbuffers.h:229–231

Access size stored in `byte_width_` bytes before data_ pointer.

  size_t size() const { return size_; }
  // Access size stored in `byte_width_` bytes before data_ pointer.
  size_t read_size() const {
    return static_cast<size_t>(ReadUInt64(data_ - byte_width_, byte_width_));
  }

 protected:
  size_t size_;