in gemmology.h [1100:1104]
void UnquantizeAndWrite::operator()(T const &total, size_t row_idx,
size_t col_idx, size_t col_size) {
auto unquantized = unquantize(total, row_idx, col_idx, col_size);
write(unquantized, row_idx, col_idx, col_size);
}