115     type SerializeStructVariant = Impossible<S::Ok, S::Error>;  typedef
117     type SerializeStructVariant = SerializeStructVariantAsMapValue<S::SerializeMap>;  typedef
305     ) -> Result<Self::SerializeStructVariant, Self::Error> {  in serialize_struct_variant()
318     ) -> Result<Self::SerializeStructVariant, Self::Error> {  in serialize_struct_variant()
576         type SerializeStructVariant = SerializeStructVariant<E>;  typedef
762         ) -> Result<Self::SerializeStructVariant, E> {  in serialize_struct_variant()
964     pub struct SerializeStructVariant<E> {  struct
965         name: &'static str,
966         variant_index: u32,
967         variant: &'static str,
968         fields: Vec<(&'static str, Content)>,
969         error: PhantomData<E>,
972     impl<E> ser::SerializeStructVariant for SerializeStructVariant<E>  implementation
1029     type SerializeStructVariant = FlatMapSerializeStructVariantAsMapValue<'a, M>;  typedef
1184     ) -> Result<Self::SerializeStructVariant, Self::Error> {  in serialize_struct_variant()