how do i setup gtest for c++ builds?

Hello, i'm having difficulty setting up the `googletest` dep for `cxx_test` commands, is there an example that works out there? The core problem seems to be that the old buck1 example for setting up googletest as a vendored library, requires the subdir_glob() command, which isn't implemented. I do see that `gtest` is definitely referenced by the buck2 `cxx_test` command