pub type N123 = NInt<U123>;
struct N123 { pub(crate) n: UInt<UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B1>, B1>, B1>, B0>, B1>, B1>, }
n: UInt<UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B1>, B1>, B1>, B0>, B1>, B1>