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diff --git a/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/cfg/IBasicBlock.java b/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/cfg/IBasicBlock.java
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+++ b/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/cfg/IBasicBlock.java
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+/*******************************************************************************
+ * Copyright (c) 2010 Alena Laskavaia and others.
+ * 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:
+ * Alena Laskavaia - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model.cfg;
+
+/**
+ * Control flow graph's basic block node - super interface of all nodes.
+ * It has set on incoming nodes and outgoing nodes.
+ * <p/>
+ *
+ * @noextend This interface is not intended to be extended by clients.
+ * @noimplement This interface is not intended to be implemented by clients.
+ */
+public interface IBasicBlock {
+ /**
+ * Incoming nodes - nodes that executed immediately before this one
+ *
+ * @return array of incoming nodes, empty array of none
+ */
+ IBasicBlock[] getIncomingNodes();
+
+ /**
+ * Outgoing nodes - where control would be passed. Can be more than one if
+ * node is condition.
+ *
+ * @return array of outgoing nodes, empty of none
+ */
+ IBasicBlock[] getOutgoingNodes();
+
+ /**
+ * @return size of array of incoming nodes
+ */
+ int getIncomingSize();
+
+ /**
+ * @return size of array of outgoing nodes
+ */
+ int getOutgoingSize();
+}