+import jalview.bin.Cache;
+import jalview.datamodel.ColumnSelection;
+import jalview.datamodel.SequenceGroup;
+import jalview.datamodel.SequenceI;
+import jalview.structure.SecondaryStructureListener;
+import jalview.structure.SelectionListener;
+import jalview.structure.SelectionSource;
+import jalview.structure.StructureSelectionManager;
+import jalview.structure.VamsasSource;
+import jalview.util.ShiftList;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.util.ArrayList;
+import java.util.Hashtable;
+import java.util.Map;