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diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/primitiverequest/ForEachPrincipalType.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/primitiverequest/ForEachPrincipalType.java
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+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/primitiverequest/ForEachPrincipalType.java
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+/*******************************************************************************
+ * 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.db.common.primitiverequest;
+
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.request.ResourceAsyncMultiRead;
+import org.simantics.db.procedure.AsyncMultiProcedure;
+
+final public class ForEachPrincipalType extends ResourceAsyncMultiRead<Resource> {
+
+    public ForEachPrincipalType(Resource resource) {
+        super(resource);
+    }
+
+	@Override
+	public void perform(AsyncReadGraph graph, AsyncMultiProcedure<Resource> procedure) {
+    	graph.forEachPrincipalType(resource, procedure);
+	}
+
+}