pub unsafe extern "C" fn g_dbus_proxy_call_with_unix_fd_list(
    proxy: *mut GDBusProxy,
    method_name: *const c_char,
    parameters: *mut GVariant,
    flags: GDBusCallFlags,
    timeout_msec: c_int,
    fd_list: *mut GUnixFDList,
    cancellable: *mut GCancellable,
    callback: GAsyncReadyCallback,
    user_data: gpointer
)