Macro fui_managed_app 

macro_rules! fui_managed_app {
    ($page_ty:ty, $build_page:expr, $get_root:expr) => { ... };
    ($page_ty:ty, $build_page:expr, $get_root:expr, mount: $mount_page:expr) => { ... };
    ($page_ty:ty, $build_page:expr, $get_root:expr, dispose: $dispose_page:expr) => { ... };
    ($page_ty:ty, $build_page:expr, $get_root:expr, mount: $mount_page:expr, dispose: $dispose_page:expr) => { ... };
}