Folder in github is missing when installed as R package

问题

I have a public R package in github.

What I did was installed that package using the below commands

install.packages("devtools")
library(devtools)
install_github("ohdsi/Aphrodite")  #APHRODITE is the package name
library(Aphrodite)

But I would like to make some changes to the way the package works.

Basically, I would like to make changes to the functions.R file under R folder in github.

As I used install_github command, I already have the package downloaded to my repository.

But I don't see the functions.R under R folder in my downloaded packages folder (APHRODITE).

Can help me understand how can I find the files to make changes?

Note: My appearance settings is set to show all hidden files and folder as well.

In github I see the below whereas in the downloaded packages folder (APHRODITE), I see something different. How can I find the functions.R file to make changes to the code locally?

来源：https://stackoverflow.com/questions/64311404/folder-in-github-is-missing-when-installed-as-r-package