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diff --git a/container-search/src/main/java/com/yahoo/search/grouping/request/AvgAggregator.java b/container-search/src/main/java/com/yahoo/search/grouping/request/AvgAggregator.java
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+++ b/container-search/src/main/java/com/yahoo/search/grouping/request/AvgAggregator.java
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+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.search.grouping.request;
+
+/**
+ * This class represents an average-aggregator in a {@link GroupingExpression}. It evaluates to the average value that
+ * the contained expression evaluated to over all the inputs.
+ *
+ * @author <a href="mailto:simon@yahoo-inc.com">Simon Thoresen</a>
+ */
+public class AvgAggregator extends AggregatorNode {
+
+ /**
+ * Constructs a new instance of this class.
+ *
+ * @param exp The expression to aggregate on.
+ */
+ public AvgAggregator(GroupingExpression exp) {
+ super("avg", exp);
+ }
+}