{"ast_node_type":"variable","tokens":[{"end":81,"kind":"keyword","start":0,"text":"let"}]}
            let Some(file) = loc_orig.file_name().and_then(|s| s.to_str()) else {
            // rmetas as dylibs.
                return Err(CrateError::ExternLocationNotFile(self.crate_name, loc_orig.clone()));