have ⟨m', h'⟩ := Object.def.mp h'.choose_spec
α : Type
h✝ : Hierarchical α
rtr : α
cpt : Component
i : Component.idType cpt
o : Component.type α cpt
h' : ∃ o, Object rtr cpt i o
h : some (Exists.choose h') = some o
⊢ Object rtr cpt i o
α : Type
h✝ : Hierarchical α
rtr : α
cpt : Component
i : Component.idType cpt
o : Component.type α cpt
h'✝ : ∃ o, Object rtr cpt i o
h : some (Exists.choose h'✝) = some o
m' : Member cpt i rtr
h' : Member.object m' = Exists.choose h'✝
⊢ Object rtr cpt i o