/// Like [sealed](https://crates.io/crates/sealed) but not a procmacro.
#[doc(hidden)]
#[macro_export]
macro_rules! __sealed__seal {
    ($vis:vis $mod:ident::$trait:ident$(<$($gen:ident),+>)?) => {
        #[doc(hidden)]
        mod $mod {
            #[doc(hidden)]
            pub trait $trait$(<$($gen),+>)? {}
        }
        #[doc(hidden)]
        $vis use $mod::$trait;
    };
}
pub use __sealed__seal as seal;