pub struct CakeToFilling;

impl Linked for CakeToFilling {
    type FromEntity = Entity;

    type ToEntity = super::filling::Entity;

    fn link(&self) -> Vec<LinkDef> {
        vec![
            super::cake_filling::Relation::Cake.def().rev().into()
                .and_on_condition(Expr::cust("a = b")),
            super::cake_filling::Relation::Filling.def().into(),
        ]
    }
}