Missed change to conform to other APIs

pkg/analyzer_plugin/lib/utilities/assist/assist_contributor_mixin.dart

Index: pkg/analyzer_plugin/lib/utilities/assist/assist_contributor_mixin.dart
diff --git a/pkg/analyzer_plugin/lib/utilities/assist/assist_contributor_mixin.dart b/pkg/analyzer_plugin/lib/utilities/assist/assist_contributor_mixin.dart
index 64ac9c2b629c867ef366df1852e5559f5075651e..7f91a4cb5008aa1113bc16fd3123ab0a8ce97035 100644
--- a/pkg/analyzer_plugin/lib/utilities/assist/assist_contributor_mixin.dart
+++ b/pkg/analyzer_plugin/lib/utilities/assist/assist_contributor_mixin.dart
@@ -27,8 +27,7 @@ abstract class AssistContributorMixin implements AssistContributor {
    * the message has parameters, then use the list of [args] to populate the
    * message.
    */
-  void addAssistFromBuilder(ChangeBuilder builder, AssistKind kind,
-      {List<Object> args}) {
+  void addAssist(AssistKind kind, ChangeBuilder builder, {List<Object> args}) {
     SourceChange change = builder.sourceChange;
     if (change.edits.isEmpty) {
       return;