Quick Fix for missing 'part of' directive.

pkg/analysis_server/lib/src/services/correction/fix.dart

Index: pkg/analysis_server/lib/src/services/correction/fix.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix.dart b/pkg/analysis_server/lib/src/services/correction/fix.dart
index 3de01d37868c216f82cee30bfa317c3e6f4df639..d4caf3acc3e084bc91154b3585066e201d0b9177 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix.dart
@@ -45,6 +45,8 @@ class DartFixKind {
       'ADD_FIELD_FORMAL_PARAMETERS', 30, "Add final field formal parameters");
   static const ADD_PACKAGE_DEPENDENCY = const FixKind(
       'ADD_PACKAGE_DEPENDENCY', 50, "Add dependency on package '{0}'");
+  static const ADD_PART_OF =
+      const FixKind('ADD_PART_OF', 50, "Add 'part of' directive");
   static const ADD_SUPER_CONSTRUCTOR_INVOCATION = const FixKind(
       'ADD_SUPER_CONSTRUCTOR_INVOCATION', 50,
       "Add super constructor {0} invocation");