{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"(Name::new_symbol_root(sym::usize),"}]}
            (Name::new_symbol_root(sym::usize), BuiltinType::Uint(BuiltinUint::Usize)),
            (Name::new_symbol_root(sym::u8),    BuiltinType::Uint(BuiltinUint::U8)),