{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"(Some(Generics"}]}
            (Some(Generics { params, span: impl_generics, .. }), Ok(snippet)) => {
        let sugg = match (ty_generics, self.psess.source_map().span_to_snippet(param.span())) {
                Some(match &params[..] {