szn-options.js
function updateExistingItems(groupUi) {
    let itemUi = groupUi.firstElementChild
    while (itemUi) {
      updateItem(itemUi)
      itemUi = itemUi.nextElementSibling
    }
  }
function updateExistingItems(groupUi) {
    let itemUi = groupUi.firstElementChild
    while (itemUi) {
      updateItem(itemUi)
      itemUi = itemUi.nextElementSibling
    }
  }
function updateExistingItems ( groupUi ) { let itemUi = groupUi . firstElementChild while ( itemUi ) { updateItem ( itemUi ) itemUi = itemUi . nextElementSibling } }
Updates all items in the provided UI container to reflect the current state of their associated options.

@param {Element} groupUi The element containing the elements representing the UIs of the options.
Updates all items in the provided UI container to reflect the current state of their associated options .