New analyzer snapshot with MapIterator.

pkg/analyzer/lib/src/generated/index.dart

Index: pkg/analyzer/lib/src/generated/index.dart
diff --git a/pkg/analyzer/lib/src/generated/index.dart b/pkg/analyzer/lib/src/generated/index.dart
index 544f582cc601bd7b831f5abf51cd9d546ce67532..4eda02cb42dbaf96d7d2b11eea310a53c5497feb 100644
--- a/pkg/analyzer/lib/src/generated/index.dart
+++ b/pkg/analyzer/lib/src/generated/index.dart
@@ -17,6 +17,7 @@ import 'element.dart';
 import 'resolver.dart' show Namespace, NamespaceBuilder;
 import 'engine.dart';
 import 'html.dart' as ht;
+import 'utilities_collection.dart';
 
 /**
  * Instances of the [RemoveSourceOperation] implement an operation that removes from the index
@@ -1504,9 +1505,9 @@ class IndexContributor extends GeneralizingAstVisitor<Object> {
       importElementsMap[importElement] = elements;
     }
     // use import namespace to choose correct one
-    for (MapEntry<ImportElement, Set<Element>> entry in getMapEntrySet(importElementsMap)) {
-      if (entry.getValue().contains(usedElement)) {
-        return entry.getKey();
+    for (MapIterator<ImportElement, Set<Element>> iter = SingleMapIterator.forMap(importElementsMap); iter.moveNext();) {
+      if (iter.value.contains(usedElement)) {
+        return iter.key;
       }
     }
     // not found