{motive : Lean.Meta.ExtractLetsConfig → Sort u} →
  (t : Lean.Meta.ExtractLetsConfig) →
    ((proofs types implicits descend underBinder usedOnly merge useContext onlyGivenNames preserveBinderNames lift :
          Bool) →
        motive
          { proofs := proofs, types := types, implicits := implicits, descend := descend, underBinder := underBinder,
            usedOnly := usedOnly, merge := merge, useContext := useContext, onlyGivenNames := onlyGivenNames,
            preserveBinderNames := preserveBinderNames, lift := lift }) →
      motive t