Do not change code under the sfs-client directory; it contains sfs-client source code from commit ff315ec.
It is created using git subtree command:

    git subtree add --prefix=src/SfsClient/sfs-client https://github.com/microsoft/sfs-client.git cf18b357f43aa9bbaba7d8b3b3774b39140aa00f --squash

To update, run the following command, then update the above commit for reference. 'master' can be replaced with the appropriate commit spec as desired.

    git subtree pull -P src/SfsClient/sfs-client https://github.com/microsoft/sfs-client master --squash

When committing the PR, DO NOT squash it. The two commits are needed as is to allow for future subtree pulls.