diff --git a/src/rules_tree.py b/src/rules_tree.py
index cb231e7..42873d2 100644
--- a/src/rules_tree.py
+++ b/src/rules_tree.py
@@ -17,7 +17,7 @@ class CondTreeNode(NodeMixin):
         self.site = site
         self.weight = weight
 
-    def add_parent_node(self, parent_node):
+    def is_adopted_by(self, parent_node):
         # print('orphan node ', self.id, ' is adopted by node ', parent_node.id)
         self.parent = parent_node
 
@@ -29,7 +29,7 @@ class TransTreeNode(NodeMixin):
         self.parent = None
         self.id = id
 
-    def add_parent_leaf_node(self, parent_node):
+    def is_adopted_by(self, parent_node):
         # print('orphan transition is adopted by leaf node', parent_node.id)
         self.parent = parent_node
 
@@ -58,13 +58,15 @@ for i in range(0, len(model.testmodel.get_transitions().get_all())):
 for i in conditions_set:
     for j in conditions_set:
         if ((i != j) & (i.parent_id == j.id)):
-            i.add_parent_node(j)
+            i.is_adopted_by(j)
 
 for condition_node in LevelOrderIter(root):
     if condition_node.is_leaf:
         for transition_node in transitions_set:
             if (str(condition_node.id) == transition_node.parent_id):
-                transition_node.add_parent_leaf_node(condition_node)
+                transition_node.is_adopted_by(condition_node)
+
+## print tree
 
 for pre, fill, node in RenderTree(root):
     treestr = u"%s%s" % (pre, node.id)