diff --git a/library/Businessprocess/BpNode.php b/library/Businessprocess/BpNode.php
index 67f3c31..c0424a8 100644
--- a/library/Businessprocess/BpNode.php
+++ b/library/Businessprocess/BpNode.php
@@ -19,20 +19,6 @@ class BpNode extends Node
     protected $counters;
     protected $missing = null;
 
-    protected static $sortStateToStateMap = array(
-        4 => 2,
-        3 => 3,
-        2 => 1,
-        1 => 99,
-        0 => 0
-    );
-
-    protected static $stateToSortStateMap = array(
-        99 => 1,
-        3  => 3,
-        2  => 4,
-        1  => 2,
-        0  => 0,
     );
 
     public function __construct(
@@ -207,26 +193,6 @@ class BpNode extends Node
         $this->state = $this->sortStateTostate($sort_state);
     }
 
-    protected function stateToSortState($state)
-    {
-        if (array_key_exists(self::$stateToSortStateMap, $state)) {
-            return self::$stateToSortStateMap[$state];
-        }
-
-        throw new ProgrammingError('Got invalid state %s', $sort_state);
-    }
-
-    protected function sortStateTostate($sortState)
-    {
-        $sortState = $sortState >> self::SHIFT_FLAGS;
-
-        if (array_key_exists(self::$sortStateToState, $sortState)) {
-            return self::$sortStateToSortState[$sortState];
-        }
-
-        throw new ProgrammingError('Got invalid sorting state %s', $sort_state);
-    }
-
     public function countChildren()
     {
         return count($this->getChildren());
diff --git a/library/Businessprocess/Node.php b/library/Businessprocess/Node.php
index c8b92f2..44ca343 100644
--- a/library/Businessprocess/Node.php
+++ b/library/Businessprocess/Node.php
@@ -23,6 +23,22 @@ abstract class Node
     const ICINGA_UNREACHABLE = 2;
     const ICINGA_PENDING     = 99;
 
+    protected static $sortStateToStateMap = array(
+        4 => 2,
+        3 => 3,
+        2 => 1,
+        1 => 99,
+        0 => 0
+    );
+
+    protected static $stateToSortStateMap = array(
+        99 => 1,
+        3  => 3,
+        2  => 4,
+        1  => 2,
+        0  => 0,
+    );
+
     /**
      * Main business process object
      *
@@ -273,6 +289,26 @@ abstract class Node
         return count($this->parents) > 0;
     }
 
+    protected function stateToSortState($state)
+    {
+        if (array_key_exists($state, self::$stateToSortStateMap)) {
+            return self::$stateToSortStateMap[$state];
+        }
+
+        throw new ProgrammingError('Got invalid state %s', $sort_state);
+    }
+
+    protected function sortStateTostate($sortState)
+    {
+        $sortState = $sortState >> self::SHIFT_FLAGS;
+
+        if (array_key_exists($sortState, self::$sortStateToStateMap)) {
+            return self::$sortStateToStateMap[$sortState];
+        }
+
+        throw new ProgrammingError('Got invalid sorting state %s', $sort_state);
+    }
+
     protected function renderHtmlForChildren($view)
     {
         $html = '';