fact: Definition oplax_comma_category `{Funext} A B (S : Pseudofunctor A) (T : Pseudofunctor B) `{forall a b, IsHSet (Functor (S a) (T b))} : PreCategory := (lax_comma_category S T)^op.
imports: Functor.Core Category.Dual InitialTerminalCategory.Core InitialTerminalCategory.Pseudofunctors Cat.Core Category.Strict NaturalTransformation.Paths Pseudofunctor.Core