--- a/gwt-client/src/main/java/org/dive4elements/river/client/shared/model/DataCageTree.java	Mon Oct 01 16:21:16 2018 +0200
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/shared/model/DataCageTree.java	Mon Oct 01 16:21:20 2018 +0200
@@ -9,53 +9,29 @@
 package org.dive4elements.river.client.shared.model;
 
 import java.io.Serializable;
-import java.util.List;
 
-public class DataCageTree implements Serializable
-{
+public class DataCageTree implements Serializable {
+
+    private static final long serialVersionUID = 1L;
 
     public interface Visitor {
         boolean accept(DataCageNode node);
-    } // interface
+    }
 
-    protected DataCageNode root;
+    private DataCageNode root;
 
     public DataCageTree() {
     }
 
-    public DataCageTree(DataCageNode root) {
+    public DataCageTree(final DataCageNode root) {
         this.root = root;
     }
 
-    public void setRoot(DataCageNode root) {
+    public void setRoot(final DataCageNode root) {
         this.root = root;
     }
 
     public DataCageNode getRoot() {
-        return root;
+        return this.root;
     }
-
-
-    protected boolean recursivePrune(DataCageNode node, Visitor visitor) {
-        if (!node.hasChildren()) {
-            return visitor.accept(node);
-        }
-
-        List<DataCageNode> children = node.getChildren();
-
-        for (int i = children.size()-1; i >= 0; --i) {
-            if (!recursivePrune(children.get(i), visitor)) {
-                children.remove(i);
-            }
-        }
-
-        return !children.isEmpty();
-    }
-
-    public boolean prune(Visitor visitor) {
-        return root == null || !root.hasChildren()
-            ? true
-            : recursivePrune(root, visitor);
-    }
-}
-// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
+}
\ No newline at end of file