how to have CLASS BUMP statement under the PORT statement in LEF ?

My design block macro have a pin to be connected to bump directly at the top level ( I want

the P&R person to place a bump at the center of that pin). According to EDI system user guide,

the PORT definition will be enhanced to have a CLASS BUMP associated to it. But I don't know how

to get that statement when I create LEF from abstract generator ? Or I just hand-edit the LEF file ?

for example :

Macro myblock

   CLASS BLOCK;

   SIZE 2661 BY 696;

   ORIGIN 0 0;

   SYMMETRY X Y R90;

   PIN A1

      DIRECTION OUTPUT;

      USE SIGNAL;

      PORT

         CLASS BUMP;

          LAYER AP;

          RECT 2469 0 2490 83;

     END

Thanks for help