{"ast_node_type":"variable","tokens":[{"end":95,"kind":"keyword","start":0,"text":"let"}]}
    let ctx = AssistContext::new(sema, config, hir::FileRange { file_id, range: range.range });
        .unwrap_or_else(|| EditionedFileId::new(db, range.file_id, Edition::CURRENT));
    let mut acc = Assists::new(&ctx, resolve);