{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"println!(\"cargo:rerun-if-env-changed={key}\");"}]}
    println!("cargo:rerun-if-env-changed={key}");
fn tracked_env_var_os<K: AsRef<OsStr> + Display>(key: K) -> Option<OsString> {
    env::var_os(key)