{"ast_node_type":"variable","tokens":[{"end":96,"kind":"keyword","start":0,"text":"let"}]}
        let span_map = SpanMap::RealSpanMap(Arc::new(RealSpanMap::absolute(EditionedFileId::new(
        let parsed = syntax::SourceFile::parse(ra_fixture, span::Edition::CURRENT);
            FileId::from_raw(0),