110     type SerializeTupleVariant = Impossible<S::Ok, S::Error>;  typedef
112     type SerializeTupleVariant = SerializeTupleVariantAsMapValue<S::SerializeMap>;  typedef
258     ) -> Result<Self::SerializeTupleVariant, Self::Error> {  in serialize_tuple_variant()
271     ) -> Result<Self::SerializeTupleVariant, Self::Error> {  in serialize_tuple_variant()
573         type SerializeTupleVariant = SerializeTupleVariant<E>;  typedef
726         ) -> Result<Self::SerializeTupleVariant, E> {  in serialize_tuple_variant()
852     pub struct SerializeTupleVariant<E> {  struct
853         name: &'static str,
854         variant_index: u32,
855         variant: &'static str,
856         fields: Vec<Content>,
857         error: PhantomData<E>,
860     impl<E> ser::SerializeTupleVariant for SerializeTupleVariant<E>  implementation
1028     type SerializeTupleVariant = Impossible<Self::Ok, M::Error>;  typedef
1162     ) -> Result<Self::SerializeTupleVariant, Self::Error> {  in serialize_tuple_variant()