{"ast_node_type":"variable","tokens":[{"end":53,"kind":"keyword","start":0,"text":"let"}]}
    let slice = slice_owned(slice, |s| &s[1..][..4]);
    let slice = slice_owned(vec![1, 2, 3, 4, 5, 6], Vec::as_slice);
    let slice = slice_owned(slice, |s| s);