working weight balanced tree (both map & set)

assira.commons/src/main/java/net/ranides/assira/collection/maps/WBTreeMapBase.java

@@ -22,7 +22,7 @@ import java.io.Serializable;
 import java.util.Comparator;
 import java.util.function.Consumer;
 
-public class WBTreeMapBase<K,V> implements Serializable {
+class WBTreeMapBase<K,V> implements Serializable {
 
     private static final long serialVersionUID = 2L;
 

assira.commons/src/main/java/net/ranides/assira/collection/sets/WBTreeSetBase.java

@@ -22,11 +22,11 @@ import java.io.Serializable;
 import java.util.Comparator;
 import java.util.function.Consumer;
 
-public class WBTreeSetBase<V> implements Serializable {
+class WBTreeSetBase<V> implements Serializable {
 
     private static final long serialVersionUID = 2L;
 
-    public enum FindMode {
+    enum FindMode {
         EQ,
         EQG,
         LT,