diff --git a/btree/BTree.cs b/btree/BTree.cs
index 544d062..7c0ad60 100644
--- a/btree/BTree.cs
+++ b/btree/BTree.cs
@@ -8,6 +8,7 @@ namespace ln.types.btree
     {
         public Comparison<K> Comparison { get; }
         public int Count => count;
+        public bool Empty => count == 0;
 
         public int LeftDepth => headNode != null ? headNode.LeftDepth : 0;
         public int RightDepth => headNode != null ? headNode.RightDepth : 0;
diff --git a/btree/BTreeValueList.cs b/btree/BTreeValueList.cs
index 58f6763..d81d226 100644
--- a/btree/BTreeValueList.cs
+++ b/btree/BTreeValueList.cs
@@ -5,6 +5,8 @@ namespace ln.types.btree
 {
     public class BTreeValueList<K, V>
     {
+        public bool Empty => bTree.Empty;
+
         BTree<K, List<V>> bTree;
 
         public BTreeValueList()
@@ -131,6 +133,9 @@ namespace ln.types.btree
             throw new Exception("Serious BUG");
         }
 
+        public K First => bTree.First();
+        public K Last => bTree.Last();
+
 
 
         public IEnumerable<K> Keys => bTree.Keys;
diff --git a/cache/Cache.cs b/cache/Cache.cs
index 597a284..966093d 100644
--- a/cache/Cache.cs
+++ b/cache/Cache.cs
@@ -1,6 +1,7 @@
 using System;
 using ln.types.btree;
 using ln.types.collections;
+using ln.types.odb.ng.storage;
 namespace ln.types.cache
 {
 	public class Cache<K,V>
@@ -11,7 +12,7 @@ namespace ln.types.cache
 		BTree<K, LinkedListItem<K>> itemTree;
 		LinkedList<K> items = new LinkedList<K>();
 
-		int maxCacheSize = 4096;
+        int maxCacheSize = 4096;
 
 		public Cache()
 		{