{motive : Lean.StructureParentInfo → Sort u} →
  (t : Lean.StructureParentInfo) →
    ((structName : Lean.Name) →
        (subobject : Bool) →
          (projFn : Lean.Name) → motive { structName := structName, subobject := subobject, projFn := projFn }) →
      motive t