question: public void addColumn ( Class classType , boolean readOnly , String header ) { m_modelHeaderClass . add ( classType ) ; setColumnReadOnly ( m_modelHeaderClass . size ( ) - 1 , readOnly ) ; addColumn ( header ) ; WListItemRenderer renderer = ( WListItemRenderer ) getItemRenderer ( ) ; renderer . setColumnClass ( ( renderer . getNoColumns ( ) - 1 ) , classType ) ; return ; }
target:  Set the attributes of the column.