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diff --git a/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/IGraphExplorerContext.java b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/IGraphExplorerContext.java
new file mode 100644
index 000000000..13888d003
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+++ b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/IGraphExplorerContext.java
@@ -0,0 +1,64 @@
+/*******************************************************************************
+ * 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.internal;
+
+import java.util.Deque;
+import java.util.List;
+
+import org.simantics.browsing.ui.DataSource;
+import org.simantics.browsing.ui.GraphExplorer;
+import org.simantics.browsing.ui.NodeQueryProcessor;
+import org.simantics.browsing.ui.PrimitiveQueryProcessor;
+import org.simantics.utils.datastructures.disposable.IDisposable;
+
+/**
+ * An internal interface for supporting the implementation of
+ * {@link GraphExplorer}. Contains methods for the interaction of GraphExplorer
+ * and {@link GENodeQueryManager}, and {@link UpdateRunner}.
+ * 
+ * <p>
+ * The main purpose of this context class is to support switching of explorer
+ * inputs in a proper way which disposes all the {@link GENodeQueryManager}'s
+ * and any resource queries possibly hidden behind them.
+ * </p>
+ * 
+ * @author Tuukka Lehtonen
+ */
+public interface IGraphExplorerContext extends IDisposable {
+
+    int queryIndent();
+    int queryIndent(int offset);
+
+    IGECache getCache();
+
+    <T> NodeQueryProcessor<T> getProcessor(Object o);
+    <T> PrimitiveQueryProcessor<T> getPrimitiveProcessor(Object o);
+    <T> DataSource<T> getDataSource(Class<T> clazz);
+
+    void update(UIElementReference ref);
+
+    Object getPropagateLock();
+    Object getPropagateListLock();
+
+    void setPropagating(boolean b);
+    boolean isPropagating();
+
+    void setScheduleList(List<Runnable> list);
+    List<Runnable> getScheduleList();
+
+    Deque<Integer> getActivity();
+    void setActivityInt(int i);
+    int getActivityInt();
+
+    void scheduleQueryUpdate(Runnable r);
+
+}