import java.util.HashMap;
import javax.swing.tree.TreePath;
import jetbrains.mps.ide.ui.MPSTreeNode;
import jetbrains.mps.internal.collections.runtime.ListSequence;
import java.util.ArrayList;
<BUG>import jetbrains.mps.internal.collections.runtime.IMapping;
</BUG>
import com.intellij.openapi.actionSystem.ToggleAction;
import javax.swing.Icon;
import com.intellij.openapi.actionSystem.AnActionEvent;

import java.util.HashMap;
import javax.swing.tree.TreePath;
import jetbrains.mps.ide.ui.MPSTreeNode;
import jetbrains.mps.internal.collections.runtime.ListSequence;
import java.util.ArrayList;
import jetbrains.mps.internal.collections.runtime.SetSequence;
import com.intellij.openapi.actionSystem.ToggleAction;
import javax.swing.Icon;
import com.intellij.openapi.actionSystem.AnActionEvent;
