{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"paren_right:"}]}
                    paren_right: if r_ty_refs != 0 { ")" } else { "" },
                    paren_left: if l_ty_refs != 0 { ")" } else { "" },
                    left_before: (l_ty_refs != 0).then_some(l_span.shrink_to_lo()),