Can it support Ref or Cow variants?

[immno]

I have a data structure similar to the following:

#[allow(clippy::derive_partial_eq_without_eq)]
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct MeasureResultProto {
    #[prost(int64, tag = "1")]
    pub id: i64,
    #[prost(int64, tag = "2")]
    pub time: i64,
    #[prost(message, optional, tag = "3")]
    pub data: ::core::option::Option<super::common::DataValueProto>,
    #[prost(message, optional, tag = "4")]
    pub filter: ::core::option::Option<super::common::DataValueProto>,
}

DataValueProto is a complex structure, which may be a basic type or json:

#[allow(clippy::derive_partial_eq_without_eq)]
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct DataValueProto {
    #[prost(oneof = "data_value_proto::ValueProto", tags = "1, 2, 3, 4, 5")]
    pub value_proto: ::core::option::Option<data_value_proto::ValueProto>,
}
/// Nested message and enum types in `DataValueProto`.
pub mod data_value_proto {
    #[allow(clippy::derive_partial_eq_without_eq)]
    #[derive(Clone, PartialEq, ::prost::Oneof)]
    pub enum ValueProto {
        #[prost(bool, tag = "1")]
        Bool(bool),
        #[prost(int64, tag = "2")]
        Long(i64),
        #[prost(double, tag = "3")]
        Double(f64),
        #[prost(string, tag = "4")]
        String(::prost::alloc::string::String),
        #[prost(string, tag = "5")]
        Json(::prost::alloc::string::String),
    }
}

Can I generate a Ref or Cow structure? DataValueProto will be used in many places. I don't want to clone it all the time. I just want to use encode_to_vec to convert it to Vec<u8>.

#[allow(clippy::derive_partial_eq_without_eq)]
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct MeasureResultProtoRef<'a> {
    #[prost(int64, tag = "1")]
    pub id: i64,
    #[prost(int64, tag = "2")]
    pub time: i64,
    #[prost(message, optional, tag = "3")]
    pub data: &'a ::core::option::Option<super::common::DataValueProto>,
    #[prost(message, optional, tag = "4")]
    pub filter: &'a ::core::option::Option<super::common::DataValueProto>,
}

This can save a lot of Clone performance. My idea is very similar to #1202 , who implemented it through Cow.