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diff --git a/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/UnaryTest.java b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/UnaryTest.java
new file mode 100644
index 000000000..7f4d72311
--- /dev/null
+++ b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/UnaryTest.java
@@ -0,0 +1,55 @@
+/*******************************************************************************
+ * 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.layer0.utils.predicates;
+
+import java.util.Collection;
+
+import org.simantics.db.Resource;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.exception.DatabaseException;
+
+public abstract class UnaryTest extends UnaryPredicate {
+
+	@Override
+	public void add(WriteGraph g, Resource r) throws DatabaseException {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public Collection<Resource> getResources(ReadGraph g) throws DatabaseException {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public void remove(WriteGraph g, Resource r) throws DatabaseException {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public boolean supportsAddition() {		
+		return false;
+	}
+
+	@Override
+	public boolean supportsRemoval() {
+		return false;
+	}
+
+	@Override
+	public boolean supportsUnboundedQuery() {
+		return false;
+	}
+
+	
+	
+}