{"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"if"}]}
            if let ty::BoundVariableKind::Region(kind) = bound_var {
        for (idx, bound_var) in bound_inputs_and_output.bound_vars().iter().enumerate() {
                let kind = ty::LateParamRegionKind::from_bound(ty::BoundVar::from_usize(idx), kind);