Fix broken tests

pkg/analysis_server/lib/src/services/refactoring/extract_method.dart

Index: pkg/analysis_server/lib/src/services/refactoring/extract_method.dart
diff --git a/pkg/analysis_server/lib/src/services/refactoring/extract_method.dart b/pkg/analysis_server/lib/src/services/refactoring/extract_method.dart
index 2a8751c7a7697d5635aa98b3fc9cdc0738fa7216..f093266db378a06a1ef53a881860ea0e9198194c 100644
--- a/pkg/analysis_server/lib/src/services/refactoring/extract_method.dart
+++ b/pkg/analysis_server/lib/src/services/refactoring/extract_method.dart
@@ -939,7 +939,7 @@ class _InitializeOccurrencesVisitor extends GeneralizingAstVisitor<Object> {
           new _Occurrence(nodeRange, ref.selectionRange.intersects(nodeRange));
       ref._occurrences.add(occurrence);
       // prepare mapping of parameter names to the occurrence variables
-      nodePattern.originalToPatternNames.forEach((String patternName, String originalName) {
+      nodePattern.originalToPatternNames.forEach((String originalName, String patternName) {
         String selectionName = patternToSelectionName[patternName];
         occurrence._parameterOldToOccurrenceName[selectionName] = originalName;
       });