use cloud_objects::cloud_object::GenericStringObjectFormat;use serde::Serialize;use serde::de::DeserializeOwned; use super::generic_string_model::{Serializer, StringModel};use crate::cloud_object::JsonObjectType;use crate::server::sync_queue::SerializedModel; /// A `JsonModel` is a string model that can be serialized to and deserialized from JSON.pub trait JsonModel: StringModel + Serialize + DeserializeOwned + 'static {    /// Returns the JsonObjectType for this model.    fn json_object_type() -> JsonObjectType;} #[allow(dead_code)]#[derive(Clone, Debug, PartialEq, Default)]pub struct JsonSerializer; impl<M: JsonModel> Serializer<M> for JsonSerializer {    fn model_format() -> GenericStringObjectFormat {        M::model_format()    }    fn serialize(model: &M) -> SerializedModel {        SerializedModel::new(serde_json::to_string(model).expect("model should serialize"))    }     fn deserialize_owned(serialized: &str) -> anyhow::Result<M>    where        Self: Sized,    {        Ok(serde_json::from_str(serialized)?)    }}