>>> (indent 4)
    selection.callMethod('enter').callMethod('append', ["svg"]).callMethod(
            'attr', ["class", "box"]).callMethod('attr', ["width", width])
        .callMethod('attr', ["height", height]).callMethod('append', ["g"])
        .callMethod(
            'attr', ["transform", 'translate(${margin[3]},${margin[0]})'])
        .callMethod('append', ["text"]).callMethod('attr', ["class", "label"])
        .callMethod('text', [(_, i, __) => groups[i]]);
<<<
    selection
        .callMethod('enter')
        .callMethod('append', ["svg"])
        .callMethod('attr', ["class", "box"])
        .callMethod('attr', ["width", width])
        .callMethod('attr', ["height", height])
        .callMethod('append', ["g"])
        .callMethod('attr', [
          "transform",
          'translate(${margin[3]},${margin[0]})',
        ])
        .callMethod('append', ["text"])
        .callMethod('attr', ["class", "label"])
        .callMethod('text', [(_, i, __) => groups[i]]);