code: static AxesWalker findClone(AxesWalker key, Vector cloneList)
    {
      if(null != cloneList)
      {
        // First, look for clone on list.
        int n = cloneList.size();
        for (int i = 0; i < n; i+=2) 
        {
          if(key == cloneList.elementAt(i))
            return (AxesWalker)cloneList.elementAt(i+1);
        }
      }
      return null;    
    }
docs: Find a clone that corresponds to the key argument.
  
  @param key The original AxesWalker for which there may be a clone.
  @param cloneList vector of sources in odd elements, and the
  corresponding clones in even vectors, may be null.
  
  @return A clone that corresponds to the key, or null if key not found.