{"ast_node_type":"impl","tokens":[{"end":60,"kind":"keyword","start":0,"text":"impl"}]}
        impl Iterator<Item = (String, &str, Severity)> + '_,
        impl Iterator<Item = (String, Lint, impl Iterator<Item = String> + '_)> + '_,
        impl Iterator<Item = (String, Lint, impl Iterator<Item = String> + '_)> + '_,