Is there any way to intercept "linux" command call and change its args?

[Adam Vodopjan]

I make a grub config to boot iso images which provide loopback.cfg. So
after some preliminary steps I run `configfile /boot/grub/loopback.cfg`
and it works as supposed.

The problem is I'd like to modify `linux`'s args used in `loopback.cfg`
(or its subsequent configs) without touching the iso images.

Speaking in bash terms let `linux` be a builtin and I want to remove
`quiet` from all calls to `linux`. Since functions override builtins, I'd
just override it with a function:

linux () {
    local arg args=()

    for arg; do
        [[ $arg == quiet ]] || args+=("$arg")
    done

    builtin linux "${args[@]}"

}


Is there anything similar in grubscript (not in the approach, but in the
result)? I tried to create `linux` function, but the command still
overrides it when called.