in src/wit.rs [203:211]
fn set_config(&self, limit: u32, cache_path: Option<String>) {
if let Some(p) = cache_path.as_ref() {
std::fs::create_dir_all(p).unwrap();
}
self.config.store(Arc::new(Config {
lru_limit: limit,
cache_path,
}));
}