missing function in moBitsNeighborhood.h

mo/src/problems/bitString/moBitsNeighborhood.h

@@ -110,6 +110,14 @@ public:
         return "moBitsNeighborhood";
     }
     
+    /**
+     * The neighborhood is random here
+     * @return true, since the neighborhood is random
+     */
+    bool isRandom() {
+        return true;
+    }
+    
 protected:
     // length of the bit strings
     unsigned int length;