{P : Sort u} →
  {argUnivs fnUnivs argUnivs' fnUnivs' : Array Lean.Level} →
    { argUnivs := argUnivs, fnUnivs := fnUnivs } = { argUnivs := argUnivs', fnUnivs := fnUnivs' } →
      (argUnivs = argUnivs' → fnUnivs = fnUnivs' → P) → P