Function cache_home_dir 

pub fn cache_home_dir() -> PathBuf

🔬This is a nightly-only experimental API. (xdg_basedir #157515)

Available on Unix only.

A base directory relative to which user-specific non-essential (cached) data should be written.

An application appid would typically be expected to write its cache data to {cache_home_dir}/{appid}/**/*.