Derive Macro Serialize

#[derive(Serialize)]
{
    // Attributes available to this derive:
    #[serde]
}

The serde Serialize/Deserialize derive macros and traits.

You will either need to add serde as a dependency in your crate’s Cargo.toml or specify the #[serde(crate = "PATH_TO_THIS_CRATE::serde")] attribute that points to the path where serde can be found.