[ABAP] Set Select-Option to invisble via Radiobuttons and MODIF ID

REPORT ztest.

TABLES pa0002.

*-----------------------------------------------------------------------
* Selection screen
*-----------------------------------------------------------------------
PARAMETERS: p_radio1               RADIOBUTTON GROUP rad1 DEFAULT 'X' USER-COMMAND rad. "set s_pernr visible
PARAMETERS: p_radio2               RADIOBUTTON GROUP rad1.                              "set s_pernr invisible

SELECT-OPTIONS : s_pernr           FOR pa0002-pernr MODIF ID 100.

*----------------------------------------------------------------------
* AT SELECTION-SCREEN
*----------------------------------------------------------------------
AT SELECTION-SCREEN OUTPUT. " PBO

  LOOP AT SCREEN.
    CASE screen-group1.
      WHEN '100'.
        screen-invisible = COND #( WHEN p_radio1 = abap_true THEN 0 ELSE 1 ).
        MODIFY SCREEN.
    ENDCASE.
  ENDLOOP.