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diff --git a/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/viewpoints/LazyContainerViewpoint.java b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/viewpoints/LazyContainerViewpoint.java
new file mode 100644
index 000000000..ced7e5eb0
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+++ b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/viewpoints/LazyContainerViewpoint.java
@@ -0,0 +1,51 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.browsing.ui.common.viewpoints;
+
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.browsing.ui.PrimitiveQueryUpdater;
+import org.simantics.browsing.ui.content.Viewpoint;
+
+public class LazyContainerViewpoint implements Viewpoint {
+
+    private NodeContext[] children = Viewpoint.PENDING_CHILDREN;
+    private Boolean        hasChildren = Viewpoint.PENDING_HAS_CHILDREN;
+
+    public LazyContainerViewpoint() {
+    }
+
+    public LazyContainerViewpoint(NodeContext[] children) {
+        this.children = children;
+        this.hasChildren = children.length > 0;
+    }
+
+    public void setChildren(PrimitiveQueryUpdater updater, NodeContext[] children) {
+        for(NodeContext c : children) updater.incRef(c);
+        for(NodeContext c : this.children) updater.decRef(c);
+        this.children = children;
+    }
+
+    public void setHasChildren(Boolean hasChildren) {
+        this.hasChildren = hasChildren;
+    }
+
+    @Override
+    public NodeContext[] getChildren() {
+        return children;
+    }
+
+    @Override
+    public Boolean getHasChildren() {
+        return hasChildren;
+    }
+
+}