extern "C" fn file_dialog_dismissed(self_: *mut cef_run_file_dialog_callback_t, selected_accept_filter: ::std::os::raw::c_int, file_paths: cef_string_list_t) {
    //let this = std::mem::ManuallyDrop::into_inner(unsafe { <cef_run_file_dialog_callback_t as RefCounter>::Wrapper::make_temp(self_) });
    let this = make_fn_once();
    let files = if file_paths.is_null() {
        None
    } else {
        Some(from_string_list(file_paths))
    };

    this(selected_accept_filter as usize, files);
}

fn make_fn_once() -> Box<dyn FnOnce(usize, Option<Vec<std::path::PathBuf>>)> {
    Box::new(|a, b| {})
}

type cef_run_file_dialog_callback_t = *const std::ffi::c_void;
type cef_string_list_t = *const std::ffi::c_void;

fn from_string_list(list: cef_string_list_t) -> Vec<std::path::PathBuf> {
    Vec::new()
}