diff --git a/src/aud/exam/prep/Pointer.java b/src/aud/exam/prep/Pointer.java
new file mode 100644
index 0000000..0bd6238
--- /dev/null
+++ b/src/aud/exam/prep/Pointer.java
@@ -0,0 +1,10 @@
+package aud.exam.prep;
+
+public class Pointer<T> {
+
+    public T deref;
+
+    public Pointer(T initial) {
+        deref = initial;
+    }
+}
diff --git a/src/aud/exam/prep/tree/OrderedTreeProcessor.java b/src/aud/exam/prep/tree/OrderedTreeProcessor.java
index a22ae11..54bdf4b 100644
--- a/src/aud/exam/prep/tree/OrderedTreeProcessor.java
+++ b/src/aud/exam/prep/tree/OrderedTreeProcessor.java
@@ -1,5 +1,7 @@
 package aud.exam.prep.tree;
 
+import aud.exam.prep.Pointer;
+
 import java.util.Comparator;
 
 /**
@@ -15,15 +17,15 @@ public interface OrderedTreeProcessor<V, T> {
 
     boolean find(T t, V v, Comparator<V> cmp);
 
-    boolean override(T t, V from, V to, Comparator<V> cmp);
+    boolean override(Pointer<T> t, V from, V to, Comparator<V> cmp);
 
-    boolean overrideAll(T t, V from, V to, Comparator<V> cmp);
+    boolean overrideAll(Pointer<T> t, V from, V to, Comparator<V> cmp);
 
     T insert(T t, V v, Comparator<V> cmp);
 
-    boolean remove(T t, V v, Comparator<V> cmp);
+    boolean remove(Pointer<T> t, V v, Comparator<V> cmp);
 
-    boolean removeAll(T t, V v, Comparator<V> cmp);
+    boolean removeAll(Pointer<T> t, V v, Comparator<V> cmp);
 
     V max(T t);