// @generated
impl serde::Serialize for MetadataKey {
    #[allow(deprecated)]
    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        use serde::ser::SerializeStruct;
        let mut len = 0;
        if !self.key.is_empty() {
            len += 1;
        }
        if !self.path.is_empty() {
            len += 1;
        }
        let mut struct_ser = serializer.serialize_struct("envoy.r#type.metadata.v2.MetadataKey", len)?;
        if !self.key.is_empty() {
            struct_ser.serialize_field("key", &self.key)?;
        }
        if !self.path.is_empty() {
            struct_ser.serialize_field("path", &self.path)?;
        }
        struct_ser.end()
    }
}
impl<'de> serde::Deserialize<'de> for MetadataKey {
    #[allow(deprecated)]
    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        const FIELDS: &[&str] = &[
            "key",
            "path",
        ];

        #[allow(clippy::enum_variant_names)]
        enum GeneratedField {
            Key,
            Path,
        }
        impl<'de> serde::Deserialize<'de> for GeneratedField {
            fn deserialize<D>(deserializer: D) -> std::result::Result<GeneratedField, D::Error>
            where
                D: serde::Deserializer<'de>,
            {
                struct GeneratedVisitor;

                impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
                    type Value = GeneratedField;

                    fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                        write!(formatter, "expected one of: {:?}", &FIELDS)
                    }

                    #[allow(unused_variables)]
                    fn visit_str<E>(self, value: &str) -> std::result::Result<GeneratedField, E>
                    where
                        E: serde::de::Error,
                    {
                        match value {
                            "key" => Ok(GeneratedField::Key),
                            "path" => Ok(GeneratedField::Path),
                            _ => Err(serde::de::Error::unknown_field(value, FIELDS)),
                        }
                    }
                }
                deserializer.deserialize_identifier(GeneratedVisitor)
            }
        }
        struct GeneratedVisitor;
        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
            type Value = MetadataKey;

            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                formatter.write_str("struct envoy.r#type.metadata.v2.MetadataKey")
            }

            fn visit_map<V>(self, mut map: V) -> std::result::Result<MetadataKey, V::Error>
                where
                    V: serde::de::MapAccess<'de>,
            {
                let mut key__ = None;
                let mut path__ = None;
                while let Some(k) = map.next_key()? {
                    match k {
                        GeneratedField::Key => {
                            if key__.is_some() {
                                return Err(serde::de::Error::duplicate_field("key"));
                            }
                            key__ = Some(map.next_value()?);
                        }
                        GeneratedField::Path => {
                            if path__.is_some() {
                                return Err(serde::de::Error::duplicate_field("path"));
                            }
                            path__ = Some(map.next_value()?);
                        }
                    }
                }
                Ok(MetadataKey {
                    key: key__.unwrap_or_default(),
                    path: path__.unwrap_or_default(),
                })
            }
        }
        deserializer.deserialize_struct("envoy.r#type.metadata.v2.MetadataKey", FIELDS, GeneratedVisitor)
    }
}
impl serde::Serialize for metadata_key::PathSegment {
    #[allow(deprecated)]
    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        use serde::ser::SerializeStruct;
        let mut len = 0;
        if self.segment.is_some() {
            len += 1;
        }
        let mut struct_ser = serializer.serialize_struct("envoy.r#type.metadata.v2.MetadataKey.PathSegment", len)?;
        if let Some(v) = self.segment.as_ref() {
            match v {
                metadata_key::path_segment::Segment::Key(v) => {
                    struct_ser.serialize_field("key", v)?;
                }
            }
        }
        struct_ser.end()
    }
}
impl<'de> serde::Deserialize<'de> for metadata_key::PathSegment {
    #[allow(deprecated)]
    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        const FIELDS: &[&str] = &[
            "key",
        ];

        #[allow(clippy::enum_variant_names)]
        enum GeneratedField {
            Key,
        }
        impl<'de> serde::Deserialize<'de> for GeneratedField {
            fn deserialize<D>(deserializer: D) -> std::result::Result<GeneratedField, D::Error>
            where
                D: serde::Deserializer<'de>,
            {
                struct GeneratedVisitor;

                impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
                    type Value = GeneratedField;

                    fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                        write!(formatter, "expected one of: {:?}", &FIELDS)
                    }

                    #[allow(unused_variables)]
                    fn visit_str<E>(self, value: &str) -> std::result::Result<GeneratedField, E>
                    where
                        E: serde::de::Error,
                    {
                        match value {
                            "key" => Ok(GeneratedField::Key),
                            _ => Err(serde::de::Error::unknown_field(value, FIELDS)),
                        }
                    }
                }
                deserializer.deserialize_identifier(GeneratedVisitor)
            }
        }
        struct GeneratedVisitor;
        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
            type Value = metadata_key::PathSegment;

            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                formatter.write_str("struct envoy.r#type.metadata.v2.MetadataKey.PathSegment")
            }

            fn visit_map<V>(self, mut map: V) -> std::result::Result<metadata_key::PathSegment, V::Error>
                where
                    V: serde::de::MapAccess<'de>,
            {
                let mut segment__ = None;
                while let Some(k) = map.next_key()? {
                    match k {
                        GeneratedField::Key => {
                            if segment__.is_some() {
                                return Err(serde::de::Error::duplicate_field("key"));
                            }
                            segment__ = map.next_value::<::std::option::Option<_>>()?.map(metadata_key::path_segment::Segment::Key);
                        }
                    }
                }
                Ok(metadata_key::PathSegment {
                    segment: segment__,
                })
            }
        }
        deserializer.deserialize_struct("envoy.r#type.metadata.v2.MetadataKey.PathSegment", FIELDS, GeneratedVisitor)
    }
}
impl serde::Serialize for MetadataKind {
    #[allow(deprecated)]
    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        use serde::ser::SerializeStruct;
        let mut len = 0;
        if self.kind.is_some() {
            len += 1;
        }
        let mut struct_ser = serializer.serialize_struct("envoy.r#type.metadata.v2.MetadataKind", len)?;
        if let Some(v) = self.kind.as_ref() {
            match v {
                metadata_kind::Kind::Request(v) => {
                    struct_ser.serialize_field("request", v)?;
                }
                metadata_kind::Kind::Route(v) => {
                    struct_ser.serialize_field("route", v)?;
                }
                metadata_kind::Kind::Cluster(v) => {
                    struct_ser.serialize_field("cluster", v)?;
                }
                metadata_kind::Kind::Host(v) => {
                    struct_ser.serialize_field("host", v)?;
                }
            }
        }
        struct_ser.end()
    }
}
impl<'de> serde::Deserialize<'de> for MetadataKind {
    #[allow(deprecated)]
    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        const FIELDS: &[&str] = &[
            "request",
            "route",
            "cluster",
            "host",
        ];

        #[allow(clippy::enum_variant_names)]
        enum GeneratedField {
            Request,
            Route,
            Cluster,
            Host,
        }
        impl<'de> serde::Deserialize<'de> for GeneratedField {
            fn deserialize<D>(deserializer: D) -> std::result::Result<GeneratedField, D::Error>
            where
                D: serde::Deserializer<'de>,
            {
                struct GeneratedVisitor;

                impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
                    type Value = GeneratedField;

                    fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                        write!(formatter, "expected one of: {:?}", &FIELDS)
                    }

                    #[allow(unused_variables)]
                    fn visit_str<E>(self, value: &str) -> std::result::Result<GeneratedField, E>
                    where
                        E: serde::de::Error,
                    {
                        match value {
                            "request" => Ok(GeneratedField::Request),
                            "route" => Ok(GeneratedField::Route),
                            "cluster" => Ok(GeneratedField::Cluster),
                            "host" => Ok(GeneratedField::Host),
                            _ => Err(serde::de::Error::unknown_field(value, FIELDS)),
                        }
                    }
                }
                deserializer.deserialize_identifier(GeneratedVisitor)
            }
        }
        struct GeneratedVisitor;
        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
            type Value = MetadataKind;

            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                formatter.write_str("struct envoy.r#type.metadata.v2.MetadataKind")
            }

            fn visit_map<V>(self, mut map: V) -> std::result::Result<MetadataKind, V::Error>
                where
                    V: serde::de::MapAccess<'de>,
            {
                let mut kind__ = None;
                while let Some(k) = map.next_key()? {
                    match k {
                        GeneratedField::Request => {
                            if kind__.is_some() {
                                return Err(serde::de::Error::duplicate_field("request"));
                            }
                            kind__ = map.next_value::<::std::option::Option<_>>()?.map(metadata_kind::Kind::Request)
;
                        }
                        GeneratedField::Route => {
                            if kind__.is_some() {
                                return Err(serde::de::Error::duplicate_field("route"));
                            }
                            kind__ = map.next_value::<::std::option::Option<_>>()?.map(metadata_kind::Kind::Route)
;
                        }
                        GeneratedField::Cluster => {
                            if kind__.is_some() {
                                return Err(serde::de::Error::duplicate_field("cluster"));
                            }
                            kind__ = map.next_value::<::std::option::Option<_>>()?.map(metadata_kind::Kind::Cluster)
;
                        }
                        GeneratedField::Host => {
                            if kind__.is_some() {
                                return Err(serde::de::Error::duplicate_field("host"));
                            }
                            kind__ = map.next_value::<::std::option::Option<_>>()?.map(metadata_kind::Kind::Host)
;
                        }
                    }
                }
                Ok(MetadataKind {
                    kind: kind__,
                })
            }
        }
        deserializer.deserialize_struct("envoy.r#type.metadata.v2.MetadataKind", FIELDS, GeneratedVisitor)
    }
}
impl serde::Serialize for metadata_kind::Cluster {
    #[allow(deprecated)]
    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        use serde::ser::SerializeStruct;
        let len = 0;
        let struct_ser = serializer.serialize_struct("envoy.r#type.metadata.v2.MetadataKind.Cluster", len)?;
        struct_ser.end()
    }
}
impl<'de> serde::Deserialize<'de> for metadata_kind::Cluster {
    #[allow(deprecated)]
    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        const FIELDS: &[&str] = &[
        ];

        #[allow(clippy::enum_variant_names)]
        enum GeneratedField {
        }
        impl<'de> serde::Deserialize<'de> for GeneratedField {
            fn deserialize<D>(deserializer: D) -> std::result::Result<GeneratedField, D::Error>
            where
                D: serde::Deserializer<'de>,
            {
                struct GeneratedVisitor;

                impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
                    type Value = GeneratedField;

                    fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                        write!(formatter, "expected one of: {:?}", &FIELDS)
                    }

                    #[allow(unused_variables)]
                    fn visit_str<E>(self, value: &str) -> std::result::Result<GeneratedField, E>
                    where
                        E: serde::de::Error,
                    {
                            Err(serde::de::Error::unknown_field(value, FIELDS))
                    }
                }
                deserializer.deserialize_identifier(GeneratedVisitor)
            }
        }
        struct GeneratedVisitor;
        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
            type Value = metadata_kind::Cluster;

            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                formatter.write_str("struct envoy.r#type.metadata.v2.MetadataKind.Cluster")
            }

            fn visit_map<V>(self, mut map: V) -> std::result::Result<metadata_kind::Cluster, V::Error>
                where
                    V: serde::de::MapAccess<'de>,
            {
                while map.next_key::<GeneratedField>()?.is_some() {
                    let _ = map.next_value::<serde::de::IgnoredAny>()?;
                }
                Ok(metadata_kind::Cluster {
                })
            }
        }
        deserializer.deserialize_struct("envoy.r#type.metadata.v2.MetadataKind.Cluster", FIELDS, GeneratedVisitor)
    }
}
impl serde::Serialize for metadata_kind::Host {
    #[allow(deprecated)]
    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        use serde::ser::SerializeStruct;
        let len = 0;
        let struct_ser = serializer.serialize_struct("envoy.r#type.metadata.v2.MetadataKind.Host", len)?;
        struct_ser.end()
    }
}
impl<'de> serde::Deserialize<'de> for metadata_kind::Host {
    #[allow(deprecated)]
    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        const FIELDS: &[&str] = &[
        ];

        #[allow(clippy::enum_variant_names)]
        enum GeneratedField {
        }
        impl<'de> serde::Deserialize<'de> for GeneratedField {
            fn deserialize<D>(deserializer: D) -> std::result::Result<GeneratedField, D::Error>
            where
                D: serde::Deserializer<'de>,
            {
                struct GeneratedVisitor;

                impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
                    type Value = GeneratedField;

                    fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                        write!(formatter, "expected one of: {:?}", &FIELDS)
                    }

                    #[allow(unused_variables)]
                    fn visit_str<E>(self, value: &str) -> std::result::Result<GeneratedField, E>
                    where
                        E: serde::de::Error,
                    {
                            Err(serde::de::Error::unknown_field(value, FIELDS))
                    }
                }
                deserializer.deserialize_identifier(GeneratedVisitor)
            }
        }
        struct GeneratedVisitor;
        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
            type Value = metadata_kind::Host;

            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                formatter.write_str("struct envoy.r#type.metadata.v2.MetadataKind.Host")
            }

            fn visit_map<V>(self, mut map: V) -> std::result::Result<metadata_kind::Host, V::Error>
                where
                    V: serde::de::MapAccess<'de>,
            {
                while map.next_key::<GeneratedField>()?.is_some() {
                    let _ = map.next_value::<serde::de::IgnoredAny>()?;
                }
                Ok(metadata_kind::Host {
                })
            }
        }
        deserializer.deserialize_struct("envoy.r#type.metadata.v2.MetadataKind.Host", FIELDS, GeneratedVisitor)
    }
}
impl serde::Serialize for metadata_kind::Request {
    #[allow(deprecated)]
    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        use serde::ser::SerializeStruct;
        let len = 0;
        let struct_ser = serializer.serialize_struct("envoy.r#type.metadata.v2.MetadataKind.Request", len)?;
        struct_ser.end()
    }
}
impl<'de> serde::Deserialize<'de> for metadata_kind::Request {
    #[allow(deprecated)]
    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        const FIELDS: &[&str] = &[
        ];

        #[allow(clippy::enum_variant_names)]
        enum GeneratedField {
        }
        impl<'de> serde::Deserialize<'de> for GeneratedField {
            fn deserialize<D>(deserializer: D) -> std::result::Result<GeneratedField, D::Error>
            where
                D: serde::Deserializer<'de>,
            {
                struct GeneratedVisitor;

                impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
                    type Value = GeneratedField;

                    fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                        write!(formatter, "expected one of: {:?}", &FIELDS)
                    }

                    #[allow(unused_variables)]
                    fn visit_str<E>(self, value: &str) -> std::result::Result<GeneratedField, E>
                    where
                        E: serde::de::Error,
                    {
                            Err(serde::de::Error::unknown_field(value, FIELDS))
                    }
                }
                deserializer.deserialize_identifier(GeneratedVisitor)
            }
        }
        struct GeneratedVisitor;
        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
            type Value = metadata_kind::Request;

            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                formatter.write_str("struct envoy.r#type.metadata.v2.MetadataKind.Request")
            }

            fn visit_map<V>(self, mut map: V) -> std::result::Result<metadata_kind::Request, V::Error>
                where
                    V: serde::de::MapAccess<'de>,
            {
                while map.next_key::<GeneratedField>()?.is_some() {
                    let _ = map.next_value::<serde::de::IgnoredAny>()?;
                }
                Ok(metadata_kind::Request {
                })
            }
        }
        deserializer.deserialize_struct("envoy.r#type.metadata.v2.MetadataKind.Request", FIELDS, GeneratedVisitor)
    }
}
impl serde::Serialize for metadata_kind::Route {
    #[allow(deprecated)]
    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        use serde::ser::SerializeStruct;
        let len = 0;
        let struct_ser = serializer.serialize_struct("envoy.r#type.metadata.v2.MetadataKind.Route", len)?;
        struct_ser.end()
    }
}
impl<'de> serde::Deserialize<'de> for metadata_kind::Route {
    #[allow(deprecated)]
    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        const FIELDS: &[&str] = &[
        ];

        #[allow(clippy::enum_variant_names)]
        enum GeneratedField {
        }
        impl<'de> serde::Deserialize<'de> for GeneratedField {
            fn deserialize<D>(deserializer: D) -> std::result::Result<GeneratedField, D::Error>
            where
                D: serde::Deserializer<'de>,
            {
                struct GeneratedVisitor;

                impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
                    type Value = GeneratedField;

                    fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                        write!(formatter, "expected one of: {:?}", &FIELDS)
                    }

                    #[allow(unused_variables)]
                    fn visit_str<E>(self, value: &str) -> std::result::Result<GeneratedField, E>
                    where
                        E: serde::de::Error,
                    {
                            Err(serde::de::Error::unknown_field(value, FIELDS))
                    }
                }
                deserializer.deserialize_identifier(GeneratedVisitor)
            }
        }
        struct GeneratedVisitor;
        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
            type Value = metadata_kind::Route;

            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                formatter.write_str("struct envoy.r#type.metadata.v2.MetadataKind.Route")
            }

            fn visit_map<V>(self, mut map: V) -> std::result::Result<metadata_kind::Route, V::Error>
                where
                    V: serde::de::MapAccess<'de>,
            {
                while map.next_key::<GeneratedField>()?.is_some() {
                    let _ = map.next_value::<serde::de::IgnoredAny>()?;
                }
                Ok(metadata_kind::Route {
                })
            }
        }
        deserializer.deserialize_struct("envoy.r#type.metadata.v2.MetadataKind.Route", FIELDS, GeneratedVisitor)
    }
}