Kill Third Party Tool Like PLSQL Developer Session

BEGIN

 FOR CUR_REC IN (select ss.username,ss.terminal,ss.sid,ss.serial#,ss.inst_id from gv$session ss where module='PL/SQL Developer') LOOP

  BEGIN

 EXECUTE IMMEDIATE 'alter system disconnect session''' || CUR_REC.sid || ',' || CUR_REC.serial# || ',@' || CUR_REC.inst_id || ''' immediate';

 EXCEPTION

      WHEN OTHERS THEN

        NULL; 

    END;

  END LOOP;

END;

/