a === b -> identical(a, b)

samples/swarm/BiIterator.dart

 /**
  * An iterator that allows the user to move forward and backward though
  * a set of items. (Bi-directional)
  */
 class BiIterator<E> {
 
   /**
    * Provides forward and backward iterator functionality to keep track
    * which item is currently selected.
    */
@@ skipping 40 matching lines @@
       currentIndex.value -= 1;
     }
     return list[currentIndex.value];
   }
 
   /**
    * Move the iterator pointer over so that it points to a given list item.
    */
   void jumpToValue(E val) {
     for (int i = 0; i < list.length; i++) {
-      if (list[i] === val) {
+      if (identical(list[i], val)) {
         currentIndex.value = i;
         break;
       }
     }
   }
 }