code: public int findItemOnlyIdx(JQMListItem item) {
          if (item == null) return -1;
          List<JQMListItem> items = getItems();
          if (items == null) return -1;
          int i = items.indexOf(item);
          if (i == -1) return -1;
          int j = 0;
          for (JQMListItem k : items) {
              if (k == null) continue;
              if (k == item) return j;
              j++;
          }
          return -1;
      }
docs: Ignores dividers, only counts JQMListItem bands.
  
  @return - logical index of this item among other items (can be useful for matching/sync
  between underlying data structure and UI in case of dynamic/multiple dividers
  and JQMListItem's click handlers).