377     type Variant = private::UnitOnly<E>;  typedef
379     fn variant_seed<T>(self, seed: T) -> Result<(T::Value, Self::Variant), Self::Error>  in variant_seed()
466     type Variant = private::UnitOnly<E>;  typedef
468     fn variant_seed<T>(self, seed: T) -> Result<(T::Value, Self::Variant), Self::Error>  in variant_seed()
545     type Variant = private::UnitOnly<E>;  typedef
547     fn variant_seed<T>(self, seed: T) -> Result<(T::Value, Self::Variant), Self::Error>  in variant_seed()
649     type Variant = private::UnitOnly<E>;  typedef
651     fn variant_seed<T>(self, seed: T) -> Result<(T::Value, Self::Variant), Self::Error>  in variant_seed()
757     type Variant = private::UnitOnly<E>;  typedef
759     fn variant_seed<T>(self, seed: T) -> Result<(T::Value, Self::Variant), Self::Error>  in variant_seed()
1506     type Variant = private::MapAsEnum<A>;  typedef
1508     fn variant_seed<T>(mut self, seed: T) -> Result<(T::Value, Self::Variant), Self::Error>  in variant_seed()