code: public final int _type2(int identity)
    {
      //int eType = _exptype2(identity);
      int eType;
      if (identity < m_blocksize)
        eType = m_exptype_map0[identity];
      else
        eType = m_exptype_map[identity>>>m_SHIFT][identity&m_MASK];
  
      if (NULL != eType)
        return m_extendedTypes[eType].getNodeType();
      else
        return NULL;
    }
docs: The optimized version of DTMDefaultBase._type().
  
  @param identity A node identity, which <em>must not</em> be equal to
  <code>DTM.NULL</code>