title: Sending a byte array (type `ay`) over D-Bus using GDBus
body: <p>I am trying to a byte array over D-Bus using the GDBus bindings. Can you please let me know how I can achive that. I tried googling but didnt help.</p>
  
  <p>Byte array contains a image file so cannot be converted to charbytearray</p>
  
  <p>Any help is appriciated</p>