Macro modele 

macro_rules! modele {
    (
        $model_name:literal,
        $model_label:literal
         =>
            $(
                $field_name:literal: $field:ident $({
                    $($key: ident: $value: expr ),*$(,)?
                })?
            ),*
            $(,interfaces: $($interfaces: literal),*)?
            $(,)?
    ) => { ... };
}