+import javax.swing.JMenuItem;
+import javax.swing.JOptionPane;
+import javax.swing.JPopupMenu;
+import javax.swing.SwingUtilities;
+
+import jalview.api.ComplexAlignFile;
+import jalview.datamodel.Alignment;
+import jalview.datamodel.ColumnSelection;
+import jalview.datamodel.SequenceI;
+import jalview.io.FileParse;
+import jalview.io.FormatAdapter;
+import jalview.io.IdentifyFile;
+import jalview.io.JalviewFileChooser;
+import jalview.io.JalviewFileView;
+import jalview.jbgui.GCutAndPasteTransfer;
+import jalview.schemes.ColourSchemeI;