diff --git a/libs/hwui/RenderNode.cpp b/libs/hwui/RenderNode.cpp
index 1dd22cf..eee93c1 100644
--- a/libs/hwui/RenderNode.cpp
+++ b/libs/hwui/RenderNode.cpp
@@ -109,6 +109,13 @@
     output << std::endl;
 }
 
+void RenderNode::visit(std::function<void(const RenderNode&)> func) const {
+    func(*this);
+    if (mDisplayList) {
+        mDisplayList.visit(func);
+    }
+}
+
 int RenderNode::getUsageSize() {
     int size = sizeof(RenderNode);
     size += mStagingDisplayList.getUsedSize();