Flexmonster - customizeCell - removing totals and subtotals for one measure

HTML

<script src="https://s3.amazonaws.com/flexmonster/2.2/flexmonster.js"></script>
<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
<script src="https://s3.amazonaws.com/flexmonster/2.3/flexmonster.js"></script>

<button onclick="clearCustomizing()">Clear Customizing</button>
<button onclick="startCustomizing()">Start Customizing</button>
<div id="pivot-container"></div>

JavaScript

var pivot = $("#pivot-container").flexmonster({
  componentFolder: "https://s3.amazonaws.com/flexmonster/2.3/",
  width: "100%",
  height: 430,
  toolbar: true,
  customizeCell: customizeCellFunction,
  report: {
    "dataSource": {
      "data": getData()
    },
    "slice": {
      "rows": [
        {"uniqueName": "Year"},
        {"uniqueName": "Month"},
        {"uniqueName": "Day"}
      ],
      "columns": [
        {"uniqueName": "[Measures]"}
      ],
      "measures": [
        {"uniqueName": "Balance", "aggregation": "sum"},
        {"uniqueName": "Other Value", "aggregation": "sum"}
      ],
      "expands": {
        "rows": [
          {
            "tuple": [
              "year.[2017]"
            ]
          },
          {
            "tuple": [
              "year.[2017]",
              "month.[january]"
            ]
          }
        ]
      }
    }
  }
});

function customizeCellFunction(html, data) {
  if (data.isTotal == true && data.measure && data.measure.name == "Balance") {
    return "";
  }
}

function preventExpand(e) {
  e.stopImmediatePropagation();
}

function clearCustomizing() {
  pivot.customizeCell(null);
}

function startCustomizing() {
  pivot.customizeCell(customizeCellFunction);
}

function getData() {
  return [{
    "Year": "2017",
    "Month": "January",
    "Day": "01",
    "Balance": 100,
    "Other Value": 1
  }, {
    "Year": "2017",
    "Month": "January",
    "Day": "02",
    "Balance": -200,
    "Other Value": 2
  }, {
    "Year": "2017",
    "Month": "January",
    "Day": "03",
    "Balance": 120,
    "Other Value": 3
  }];
}