{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"!db.source_root(source_root_id).source_root(db).is_library"}]}
    !db.source_root(source_root_id).source_root(db).is_library
    let source_root_id = db.file_source_root(root_file).source_root_id(db);
}