{"ast_node_type":"other","tokens":[{"end":27,"kind":"keyword","start":0,"text":"self.with_db(|db|"}]}
        self.with_db(|db| {
    pub fn is_library_file(&self, file_id: FileId) -> Cancellable<bool> {
            let source_root = db.file_source_root(file_id).source_root_id(db);