diff --git a/src/test/java/examples/portfolio/PortfolioAssetInterface.java b/src/test/java/examples/portfolio/PortfolioAssetInterface.java
new file mode 100644
index 000000000..dbc7fd742
--- /dev/null
+++ b/src/test/java/examples/portfolio/PortfolioAssetInterface.java
@@ -0,0 +1,13 @@
+package examples.portfolio;
+
+public interface PortfolioAssetInterface
+{
+	public long getAssetId();
+	public void setAssetId(long assetId);
+
+	public int getShares();
+	public void setShares(int shares);
+
+	public double getPrice();
+	public void setPrice(double price);
+}
\ No newline at end of file
diff --git a/src/test/java/examples/portfolio/PortfolioValueAccumulator.java b/src/test/java/examples/portfolio/PortfolioValueAccumulator.java
new file mode 100644
index 000000000..23f0364f3
--- /dev/null
+++ b/src/test/java/examples/portfolio/PortfolioValueAccumulator.java
@@ -0,0 +1,26 @@
+package examples.portfolio;
+
+import java.util.function.Consumer;
+
+import org.apache.commons.lang3.mutable.MutableDouble;
+
+import net.openhft.chronicle.core.values.LongValue;
+import net.openhft.chronicle.map.MapEntry;
+
+public final class PortfolioValueAccumulator implements Consumer<MapEntry<LongValue, PortfolioAssetInterface>>
+{
+	final MutableDouble total;
+	final PortfolioAssetInterface asset;
+	public PortfolioValueAccumulator(MutableDouble total, PortfolioAssetInterface asset)
+	{
+		this.total = total;
+		this.asset = asset;
+	}
+
+	@Override
+	public void accept(MapEntry<LongValue, PortfolioAssetInterface> e)
+	{
+		e.value().getUsing(asset);
+		total.add(asset.getShares() * asset.getPrice());
+	}
+}
\ No newline at end of file