import jalview.api.SequenceStructureBinding;
import jalview.api.StructureSelectionManagerProvider;
import jalview.structure.*;
+import jalview.structures.models.SequenceStructureBindingModel;
-public abstract class JalviewVarnaBinding implements StructureListener,
+public abstract class JalviewVarnaBinding extends SequenceStructureBindingModel implements StructureListener,
SequenceStructureBinding, ComponentListener,
StructureSelectionManagerProvider