I am new to R and have a question on the function posted here: [R RStudio Resetting debug / function environment](https://stackoverflow.com/questions/23327741/r-rstudio-resetting-debug-function-environment). Why are the objects set to themselves (e.g. "getmean = getmean" etc.)? Couldn't it simply be written as follows: `list(set, get, setmean, getmean)`