Update refactoring lab
Update refactoring lab

lionell/labs,lionell/labs,lionell/university-labs,lionell/labs,lionell/labs,lionell/university-labs,lionell/labs,lionell/labs,lionell/laboratories,lionell/labs,lionell/university-labs,lionell/labs,lionell/university-labs,lionell/labs,lionell/laboratories,lionell/labs,lionell/laboratories,lionell/labs