--- /dev/null
+package jalview.datamodel;
+
+import java.awt.Color;
+import java.util.BitSet;
+import java.util.List;
+
+public interface GroupSetI
+{
+ boolean hasGroups();
+
+ String getNewick();
+
+ boolean hasTree();
+
+ void updateGroups(List<BitSet> colGroups);
+
+ BitSet getGroupsFor(int column);
+
+ Color getColourForGroup(BitSet bs);
+
+ void setColorForGroup(BitSet bs, Color color);
+
+ void restoreGroups(List<BitSet> newgroups, String treeMethod, String tree,
+ double thresh2);
+
+ boolean hasCutHeight();
+
+ double getCutHeight();
+
+ String getTreeMethod();
+
+ List<BitSet> getGroups();
+
+}