{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"(colon_span.shrink_to_hi(),"}]}
                                    (colon_span.shrink_to_hi(), Introducer::Nothing, None)
                                } else if let Some(colon_span) = param.colon_span {
                                } else if param.is_impl_trait() {