add new missing method
diff --git a/org.eclipse.contribution.weaving.jdt.tests/src/org/eclipse/contribution/weaving/jdt/tests/sourceprovider/SourceTransformerTests.java b/org.eclipse.contribution.weaving.jdt.tests/src/org/eclipse/contribution/weaving/jdt/tests/sourceprovider/SourceTransformerTests.java
index 5fcbfa6..ac02931 100644
--- a/org.eclipse.contribution.weaving.jdt.tests/src/org/eclipse/contribution/weaving/jdt/tests/sourceprovider/SourceTransformerTests.java
+++ b/org.eclipse.contribution.weaving.jdt.tests/src/org/eclipse/contribution/weaving/jdt/tests/sourceprovider/SourceTransformerTests.java
@@ -32,6 +32,8 @@
 import org.eclipse.jdt.internal.compiler.env.IBinaryNestedType;
 import org.eclipse.jdt.internal.compiler.env.IBinaryType;
 import org.eclipse.jdt.internal.compiler.env.IBinaryTypeAnnotation;
+import org.eclipse.jdt.internal.compiler.env.ITypeAnnotationWalker;
+import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment;
 import org.eclipse.jdt.internal.core.BinaryType;
 import org.eclipse.jdt.internal.core.JavaElement;
 import org.eclipse.jdt.internal.core.JavaModelManager;
@@ -234,5 +236,10 @@
 		public IBinaryTypeAnnotation[] getTypeAnnotations() {
 			return null;
 		}
+
+		public ITypeAnnotationWalker enrichWithExternalAnnotationsFor(ITypeAnnotationWalker arg0, Object arg1,
+				LookupEnvironment arg2) {
+			return null;
+		}
     }
 }