import org.jetbrains.mps.openapi.model.SNode;
import org.jetbrains.mps.openapi.module.ModelAccess;
import org.jetbrains.mps.openapi.module.SRepositoryContentAdapter;
import org.jetbrains.mps.openapi.module.SRepositoryListener;
import javax.swing.tree.DefaultTreeModel;
<BUG>import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;</BUG>
public class SModelNodeListeners {

import org.jetbrains.mps.openapi.model.SNode;
import org.jetbrains.mps.openapi.module.ModelAccess;
import org.jetbrains.mps.openapi.module.SRepositoryContentAdapter;
import org.jetbrains.mps.openapi.module.SRepositoryListener;
import javax.swing.tree.DefaultTreeModel;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class SModelNodeListeners {
