diff --git a/lib/src/model/type_parameter.dart b/lib/src/model/type_parameter.dart
index 23b8d686be..f8843576fb 100644
--- a/lib/src/model/type_parameter.dart
+++ b/lib/src/model/type_parameter.dart
@@ -69,13 +69,9 @@ class TypeParameter extends ModelElement {
 
   @override
   Map<String, CommentReferable> get referenceChildren {
-    if (_referenceChildren == null) {
-      _referenceChildren = {};
-      _referenceChildren
-          .addEntries(parameters.map((p) => MapEntry(p.referenceName, p)));
-      _referenceChildren[boundType.name] = boundType;
-    }
-    return _referenceChildren;
+    return _referenceChildren ??= {
+      boundType.name: boundType,
+    };
   }
 
   @override