Method PopulateBiMap

src/table/rowgroup.cpp:280–284

		          list_column->null_map_arr.push_back(is_null);
		          auto& offsets = list_column->ofs_arr;
		          offsets.push_back((offsets.empty() ? 0 : offsets.back()) + json_value.size());
		          if (is_null) { return; }

		          if (col_description.type == DataType::MAP) {
			          auto& struct_col = std::get<up<Struct>>(list_column->child);

			          for (auto& [key, value] : json_value.items()) {
				          const auto key_value_struct = nlohmann::json {{"key", key}, {"value", value}};