Failed to configure mass storage function attrs using scheme

[katyo]

I set attrs in my scheme like so:

functions :
{
  cdrom0 :
  {
    instance = "0";
    type = "mass_storage";
    attrs :
    {
      stall = false;
      luns = (
        {
          ro = true;
          removable = true;
          cdrom = true;
        },
        {
          ro = false;
          removable = true;
          cdrom = false;
        }
      );
    };
  };
};

But actually the default values is used.
After I save scheme (i.e. via gt save --file gadget.scheme gadget) I have the following:

    mass_storage_0 :
    {
        instance = "0";
        type = "mass_storage";
        attrs :
        {
            stall = false;
            luns = (
                {
                    cdrom = false; # <-- expedted to be `true`
                    ro = false; # <-- expected to be `true` too
                    nofua = false;
                    removable = true;
                    file = "";
                },
                {
                    cdrom = false;
                    ro = false;
                    nofua = false;
                    removable = true;
                    file = "";
                } );
        };
        os_descs = ( );
    };

Manually read values is same:

$ cat /sys/kernel/config/usb_gadget/gadget/functions/mass_storage.0/lun.0/cdrom
0

$ cat /sys/kernel/config/usb_gadget/gadget/functions/mass_storage.0/lun.0/ro
0