fact: Definition mapinO_O_leq (O1 O2 : Subuniverse) `{O1 <= O2} {A B : Type} (f : A -> B) `{MapIn O1 A B f} : MapIn O2 f.
imports: HoTT.Basics HoTT.Types Equiv.BiInv Extensions HProp HFiber NullHomotopy Limits.Pullback PathAny Colimits.Pushout