--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2020 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:
+ * Semantum Oy - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db;
+
+/**
+ * @author Tuukka Lehtonen
+ * @since 1.43.0
+ */
+public interface ResourceLocator {
+
+ /**
+ * Layer0 is an integral part of Simantics database modelling and for performance
+ * reasons deserves simplest possible access to its resource class.
+ *
+ * @return returns the internally cached
+ * <code>org.simantics.layer0.Layer0</code> instance
+ */
+ public <T> T l0();
+
+}