{"ast_node_type":"other","tokens":[{"end":27,"kind":"keyword","start":0,"text":".iter()"}]}
                    .iter()
                    [if has_return_arg { 1 } else { 0 }..fixed_arg_count]
                    .map(|arg| if arg.value_type.bits() == 128 { 2 } else { 1 })