Macro zng_unique_id::unique_id_64

macro_rules! unique_id_64 {
    ($(#[$attrs:meta])* $vis:vis struct $Type:ident $(< $T:ident $(:($($bounds:tt)+))? >)? $(: $ParentId:path)? ;) => { ... };
}

Declare a new unique id type that is backed by a NonZeroU64.