{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"env::var_os(executable_name.to_ascii_uppercase())"}]}
    env::var_os(executable_name.to_ascii_uppercase())
fn lookup_as_env_var(executable_name: &str) -> Option<Utf8PathBuf> {
        .map(PathBuf::from)