code: synchronized public DTM getDTM(int nodeHandle)
    {
      try
      {
        // Performance critical function.
        return m_dtms[nodeHandle >>> IDENT_DTM_NODE_BITS];
      }
      catch(java.lang.ArrayIndexOutOfBoundsException e)
      {
        if(nodeHandle==DTM.NULL)
  				return null;		// Accept as a special case.
        else
  				throw e;		// Programming error; want to know about it.
      }    
    }
docs: Return the DTM object containing a representation of this node.
  
  @param nodeHandle DTM Handle indicating which node to retrieve
  
  @return a reference to the DTM object containing this node.