{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"Some(vec![(callee_span,"}]}
            Some(vec![(callee_span, "char::from_u32_unchecked".to_string())]),
        (ty::Uint(ty::UintTy::U32), ty::Char) => (
            Some("consider using `char::from_u32(…).unwrap()`"),