void
      OctreeLowMemBase<DataT, LeafT>::deserializeLeafCallback (
                                                         OctreeLeaf& leaf_arg,
                                                         const OctreeKey& key_arg,
                                                         typename std::vector<DataT>::const_iterator& dataVectorIterator_arg,
                                                         typename std::vector<DataT>::const_iterator& dataVectorEndIterator_arg)
      {
        OctreeKey dataKey;
        bool bKeyBasedEncoding = false;

        // add DataT objects to octree leaf as long as their key fit to voxel
        while ((dataVectorIterator_arg != dataVectorEndIterator_arg)
            && (this->genOctreeKeyForDataT (*dataVectorIterator_arg, dataKey) && (dataKey == key_arg)))
        {
          leaf_arg.setData (*dataVectorIterator_arg);
          dataVectorIterator_arg++;
          bKeyBasedEncoding = true;
        }

        // add single DataT object to octree if key-based encoding is disabled
        if (!bKeyBasedEncoding)
        {
          leaf_arg.setData (*dataVectorIterator_arg);
          dataVectorIterator_arg++;
        }
      }
      void
      OctreeLowMemBase<DataT, LeafT>::deserializeLeafCallback (OctreeLeaf& leaf_arg, const OctreeKey& key_arg)
      {

        DataT newDataT;

        // initialize new leaf child
        if (genDataTByOctreeKey (key_arg, newDataT))
        {
          leaf_arg.setData (newDataT);
        }

      }
      void
      OctreeLowMemBase<DataT, LeafT>::deserializeTreeAndSerializeLeafCallback (OctreeLeaf& leaf_arg,
                                                                         const OctreeKey& key_arg,
                                                                         std::vector<DataT>& dataVector_arg)
      {

        DataT newDataT;

        // initialize new leaf child
        if (genDataTByOctreeKey (key_arg, newDataT))
        {
          leaf_arg.setData (newDataT);
          dataVector_arg.push_back (newDataT);
        }
      }