Check only a range of checkboxes

I have this code with works brilliantly for me. I just need a small alteration to be able to select a range of cells as well, meaning:

Either H15-H17 or H22 or H26 in the attached image.enter image description here

the code I have is the following:

var CHECKBOX_CELLS = ["H15", "H22", "H26"];

function onEdit(e) {
  var range = e.range;

  var checkboxIndex = CHECKBOX_CELLS.indexOf(range.getA1Notation());

  if (checkboxIndex > -1 && range.getValue() == true) {
    var sheet = range.getSheet();

    for (var i=0; i<CHECKBOX_CELLS.length; i++) {
      if (i==checkboxIndex) continue;

      sheet.getRange(CHECKBOX_CELLS[i]).setValue(false);
    }
  }
}