theorem instCoffeeChainAtToParent
theorem instCoffeeChainAtToParent: ∀ (x t : Type) [CoffeeChain.At x t], ObjectAggregate.At x t
theorem instCoffeeChainAtToParent
theorem instCoffeeChainAtToParent: ∀ (x t : Type) [CoffeeChain.At x t], ObjectAggregate.At x t