{"ast_node_type":"other","tokens":[{"end":21,"kind":"keyword","start":0,"text":"|bound|"}]}
            |bound| {
        self.bounds_for_param(param_def_id).flat_map(|bp| bp.bounds.iter().rev()).find_map(
                let span_for_parentheses = if let Some(trait_ref) = bound.trait_ref()