electron - Not able to access pdf inside .asar file electronjs -

i want access pdf inside .asar file in electronjs. please find below code.

var {shell} = window.require('electron');  shell.openitem("f:\rnd\electron\iwb-electron\build\iwb-electron-win32-x64\resources\app.asar\iwb-app\data\wl_intro_iwb_credits.pdf  ");