theorem instCoeDepTypeRoleOfIs._proof_1
theorem instCoeDepTypeRoleOfIs._proof_1: ∀ (x : Type) [ta3nj1a4.Role.Is x], ta3nj1a4.Role.Is x
theorem instCoeDepTypeRoleOfIs._proof_1
theorem instCoeDepTypeRoleOfIs._proof_1: ∀ (x : Type) [ta3nj1a4.Role.Is x], ta3nj1a4.Role.Is x