Fix a comment

Author: jcollins-g

lib/src/model.dart

@@ -515,8 +515,9 @@ class Class extends ModelElement
 
   Map<String, List<ModelElement>> _membersByName;
 
-  /// This enables object substitution for canonicalization.  Uses the name
-  /// of the ModelElement and its type to retrieve a matching ModelElement.
+  /// This enables object substitution for canonicalization, such as Interceptor
+  /// for Object.  Uses the name of the ModelElement and its type to retrieve a
+  /// matching ModelElement.
   ModelElement memberByExample(ModelElement example) {
     if (_membersByName == null) {
       _membersByName = new Map();