intro ⟨m⟩
α : Type
inst✝ : Hierarchical α
rtr : α
cpt : Component
i : Component.idType cpt
o : Component.type α cpt
⊢ Object rtr cpt i o → rtr[cpt][i] = some o
α : Type
inst✝ : Hierarchical α
rtr : α
cpt : Component
i : Component.idType cpt
o : Component.type α cpt
m : Member cpt i rtr
⊢ rtr[cpt][i] = some (Member.object m)