{"ast_node_type":"variable","tokens":[{"end":54,"kind":"keyword","start":0,"text":"let"}]}
            let source_file = ctx.sema.parse(file_id);
        for (file_id, refs) in node_def.usages(&ctx.sema).all() {
            let usages = refs.into_iter().filter_map(|FileReference { range, .. }| {