{"ast_node_type":"variable","tokens":[{"end":47,"kind":"keyword","start":0,"text":"let"}]}
        let mut host = AnalysisHost::default();
    fn position(#[rust_analyzer::rust_fixture] ra_fixture: &str) -> (AnalysisHost, FilePosition) {
        let change_fixture = ChangeFixture::parse(host.raw_database(), ra_fixture);