{"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"acc.add(AssistId::refactor(\"remove_mut\"),"}]}
    acc.add(AssistId::refactor("remove_mut"), "Remove `mut` keyword", target, |builder| {
    let target = mut_token.text_range();
        let mut editor = builder.make_editor(&mut_token.parent().unwrap());