lazy_static::lazy_static!

macro_rules! lazy_static {
    (static ref $N:ident : $T:ty = $e:expr; $($t:tt)*) => { ... };
    (pub static ref $N:ident : $T:ty = $e:expr; $($t:tt)*) => { ... };
    ($VIS:ident static ref $N:ident : $T:ty = $e:expr; $($t:tt)*) => { ... };
    (MAKE TY PUB $N:ident) => { ... };
    (MAKE TY PRIV $N:ident) => { ... };
    () => { ... };
}