code: public void callChildVisitors(XSLTVisitor visitor, boolean callAttributes)
    {
    	if(callAttributes && (null != m_selectExpression))
    		m_selectExpression.callVisitors(this, visitor);
    		
      int length = getSortElemCount();
  
      for (int i = 0; i < length; i++)
      {
        getSortElem(i).callVisitors(visitor);
      }
  
      super.callChildVisitors(visitor, callAttributes);
    }
docs: Call the children visitors.
  @param visitor The visitor whose appropriate method will be called.