theorem Dictionary.instCoeDepTypeObserverOfIs._proof_1
theorem Dictionary.instCoeDepTypeObserverOfIs._proof_1: ∀ (x : Type) [mbdw2246.Dictionary.Observer.Is x], mbdw2246.Dictionary.Observer.Is x
theorem Dictionary.instCoeDepTypeObserverOfIs._proof_1
theorem Dictionary.instCoeDepTypeObserverOfIs._proof_1: ∀ (x : Type) [mbdw2246.Dictionary.Observer.Is x], mbdw2246.Dictionary.Observer.Is x