{"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"match"}]}
        match self.env_var_os(key.as_ref()) {
    pub fn env_var<K: ?Sized + AsRef<OsStr>>(self, key: &'tcx K) -> Result<&'tcx str, VarError> {
            Some(value) => value.to_str().ok_or_else(|| VarError::NotUnicode(value.to_os_string())),