{"ast_node_type":"variable","tokens":[{"end":74,"kind":"keyword","start":0,"text":"let"}]}
        let frange = FileRange { file_id, range: range_or_offset.into() };
        let (db, file_id, range_or_offset) = RootDatabase::with_range_or_offset(ra_fixture);
        let sema = Semantics::new(&db);