pub unsafe extern "C" fn fdf_token_register(
token: zx_handle_t,
dispatcher: *mut fdf_dispatcher_t,
handler: *mut fdf_token_t,
) -> zx_status_tpub unsafe extern "C" fn fdf_token_register(
token: zx_handle_t,
dispatcher: *mut fdf_dispatcher_t,
handler: *mut fdf_token_t,
) -> zx_status_t