{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"db.source_root(source_root).source_root(db).is_library"}]}
            db.source_root(source_root).source_root(db).is_library
            let source_root = db.file_source_root(file_id).source_root_id(db);
        })