theorem Dictionary.instCoeDepTypeObserverOfIs._proof_1
theorem Dictionary.instCoeDepTypeObserverOfIs._proof_1: ∀ (x : Type) [e4xks8h4.Dictionary.Observer.Is x], e4xks8h4.Dictionary.Observer.Is x
theorem Dictionary.instCoeDepTypeObserverOfIs._proof_1
theorem Dictionary.instCoeDepTypeObserverOfIs._proof_1: ∀ (x : Type) [e4xks8h4.Dictionary.Observer.Is x], e4xks8h4.Dictionary.Observer.Is x