pub unsafe extern "C" fn fdf_env_shutdown_dispatchers_async(
driver: *const c_void,
observer: *mut fdf_env_driver_shutdown_observer_t,
) -> zx_status_t
pub unsafe extern "C" fn fdf_env_shutdown_dispatchers_async(
driver: *const c_void,
observer: *mut fdf_env_driver_shutdown_observer_t,
) -> zx_status_t