pub(crate) fn generate(
    mut writer: impl std::io::Write,
    type_name: &str,
    generics: super::Generics<'_>,
    map_namespace: &impl crate::MapNamespace,
    resource_metadata: &super::ResourceMetadata<'_>,
) -> Result<(), crate::Error> {
    if let Some(metadata_ty) = &resource_metadata.metadata_ty {
        let local = crate::map_namespace_local_to_string(map_namespace)?;

        let type_generics_impl = generics.type_part.map(|part| format!("<{part}>")).unwrap_or_default();
        let type_generics_type = generics.type_part.map(|part| format!("<{part}>")).unwrap_or_default();
        let type_generics_where = generics.where_part.map(|part| format!(" where {part}")).unwrap_or_default();

        writeln!(
            writer,
            include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/templates/impl_metadata.rs")),
            local = local,
            type_name = type_name,
            type_generics_impl = type_generics_impl,
            type_generics_type = type_generics_type,
            type_generics_where = type_generics_where,
            metadata_type_name = metadata_ty,
            metadata_expr = "&self.metadata",
            metadata_mut_expr = "&mut self.metadata",
        )?;
    }

    Ok(())
}