{
  "of": {
    "multifield": {
      "gap": {"value": "8px"},
      "field": {
        "column-gap": {"value": "2px"},
        "max-inline-size": {"value": "100%"}
      },
      "remove-button": {
        "inset-block-start": {"value": "{utrecht.textbox.border-width}"}
      }
    },
    "multifield-container": {
      "button-group": {
        "margin-block-start": {"value": "8px"}
      }
    }
  }
}