{"ast_node_type":"variable","tokens":[{"end":74,"kind":"keyword","start":0,"text":"let"}]}
    let current_crate: hir::Crate = crates_for(db, file_id).pop()?.into();
    let file = sema.parse_guess_edition(file_id).syntax().clone();
    let original_token = pick_best_token(file.token_at_offset(offset), |kind| match kind {