{G : Type u_1} →
  [inst : Group G] →
    [inst_1 : TopologicalSpace G] →
      {motive : OpenSubgroup G → Sort u} →
        (t : OpenSubgroup G) →
          ((toSubgroup : Subgroup G) →
              (isOpen' : IsOpen toSubgroup.carrier) → motive { toSubgroup := toSubgroup, isOpen' := isOpen' }) →
            motive t