code: function (item) {
  /*Line 244 - 'AtomItemsControl.js' */                if (item == null)
  /*Line 245 - 'AtomItemsControl.js' */                    return -1;
  /*Line 246 - 'AtomItemsControl.js' */                var array = this.get_dataItems();
  /*Line 247 - 'AtomItemsControl.js' */                var ae = new AtomEnumerator(array);
  /*Line 248 - 'AtomItemsControl.js' */                while (ae.next()) {
  /*Line 249 - 'AtomItemsControl.js' */                    if (ae.current() == item)
  /*Line 250 - 'AtomItemsControl.js' */                        return ae.currentIndex();
  /*Line 251 - 'AtomItemsControl.js' */                }
  /*Line 252 - 'AtomItemsControl.js' */                return -1;
  /*Line 253 - 'AtomItemsControl.js' */            }
docs: /*Line 243 - 'AtomItemsControl.js'